<?php
/*
============================================================================== 
	Dokeos - elearning and course management software
	
	Copyright (c) 2004-2005 Dokeos S.A.
	Copyright (c) 2003 Ghent University (UGent)
	Copyright (c) 2001 Universite catholique de Louvain (UCL)
	Copyright (c) Denes Nagy
	Copyright (c) Yannick Warnier
	
	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".
	
	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	See the GNU General Public License for more details.
	
	Contact address: Dokeos, 44 rue des palais, B-1030 Brussels, Belgium
	Mail: info@dokeos.com
==============================================================================
*/
/**
==============================================================================
* This is a function library for the learning path.
*
* Due to the face that the learning path has been built upon the resoucelinker,
* naming conventions have changed at least 2 times. You can see here in order the :
* 1. name used in the first version of the resourcelinker
* 2. name used in the first version of the LP
* 3. name used in the second (current) version of the LP
*
*       1.       2.        3.
*   Category = Chapter = Module
*   Item (?) = Item    = Step
*
* @author  Denes Nagy <darkden@evk.bke.hu>, main author
* @author  Roan Embrechts, some code cleaning
* @author	Yannick Warnier <yannick.warnier@dokeos.com>, multi-level learnpath behaviour + new SCORM tool
* @access  public
* @package dokeos.learnpath
* @todo rename functions to coding conventions: not deleteitem but delete_item, etc
* @todo rewrite functions to comply with phpDocumentor
* @todo remove code duplication
============================================================================== 
*/

/**
 * This function deletes an item
 * @param integer 	$id: the item we want to delete
 * @return boolean	True if item was deleted, false if not found or error 
 **/
function deleteitem($id)
{
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);
	//get the display order for this item before it is deleted
	$sql = "SELECT display_order, parent_item_id FROM $tbl_lp_item WHERE id=$id";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	if (mysql_num_rows($result) == 0)
	{
		return false;
	}
	$row = mysql_fetch_row($result);
	$display_order = $row[0];
	$parent_item_id = $row[1];
	// delete the item
	$sql = "DELETE FROM $tbl_learnpath_item WHERE id='$id'";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	if ($result === false)
	{
		return false;
	}
	// update the other items and chapters
	$sql = "UPDATE $tbl_learnpath_item SET display_order = display_order-1 WHERE display_order > $display_order AND parent_item_id = $parent_item_id";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$sql = "UPDATE $tbl_learnpath_chapter SET display_order = display_order-1 WHERE display_order > $display_order AND parent_item_id = $parent_item_id";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	//return
	return true;
}

/**
 * This function deletes a module(chapter) and all its steps(items).
 *
 * @param integer id of the chapter we want to delete
 * @return boolean	True on success and false if not found or error
 **/
function deletemodule($parent_item_id)
{
	global $learnpath_id;
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);

	//Added for multi-level behaviour - slightly recursive
	$sql = "SELECT * FROM $tbl_learnpath_chapter WHERE lp_id=$learnpath_id";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	while ($row = mysql_fetch_array($result))
	{
		if ($row['parent_item_id'] == $parent_item_id)
		{
			//delete every subchapter
			if (deletemodule($row['id']) === false)
			{
				return false;
			}
		}
	}

	//get this chapter's display order
	$sql = "SELECT display_order, parent_item_id FROM $tbl_learnpath_chapter WHERE id=$parent_item_id and lp_id=$learnpath_id";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	if (mysql_num_rows($result) == 0)
	{
		return false;
	}
	$row = mysql_fetch_row($result);

	$display_order = $row[0];
	$parent_id = $row[1];

	//delete the chapter itself
	$sql = "DELETE FROM $tbl_learnpath_chapter WHERE (id=$parent_item_id and lp_id=$learnpath_id)";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	//delete items from that chapter
	$sql2 = "DELETE FROM $tbl_learnpath_item WHERE parent_item_id=$parent_item_id";
	$result = api_sql_query($sql2, __FILE__, __LINE__);

	//update all other chapters accordingly
	$sql = "UPDATE $tbl_learnpath_item SET display_order = display_order-1 WHERE display_order > $display_order AND parent_item_id = $parent_id";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$sql = "UPDATE $tbl_learnpath_chapter SET display_order = display_order-1 WHERE display_order > $display_order AND parent_item_id = $parent_id";
	$result = api_sql_query($sql, __FILE__, __LINE__);

	return true;
}

/**
 * This function deletes an entire path.
 *
 * @param integer 	$id: the path we want to delete
 * @return	void 
 **/
function deletepath($path_id)
{
	$tbl_learnpath_main = Database :: get_course_table(TABLE_LEARNPATH_MAIN);
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);

	$sql = "DELETE FROM $tbl_learnpath_main WHERE lp_id='$path_id'";
	$result = api_sql_query($sql, __FILE__, __LINE__);

	//@TODO check how this function is used before uncommenting the following
	//also delete all elements inside that path
	$sql = "SELECT * FROM $tbl_learnpath_chapter WHERE lp_id=$path_id";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	while ($row = mysql_fetch_array($result))
	{
		deletemodule($row['id']);
	}
}

/**
 * This function moves an item.
 *
 * @param string    $direction: move the given chapter up or down
 * @param integer   Item ID
 * @param integer   $moduleid: the id of the chapter the element resides in
 * @return	boolean	Returns false on error 
 * @note    With this new version, the moveitem deals with items AND directories (not the base-level modules). This is a lot more complicated but is a temporary step towards new database structure as 'everything is an item'
 **/
function moveitem($direction, $id, $moduleid, $type = 'item')
{
	global $learnpath_id;
	$tbl_learnpath_item     = Database::get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter  = Database::get_course_table(TABLE_LEARNPATH_CHAPTER);

	$tree = get_learnpath_tree($learnpath_id);
	$orig_order = 0;
	$orig_type = '';
	$orig_id = $id;
	foreach ($tree[$moduleid] as $row)
	{
		//if this is the element we want (be it a chapter or an item), get its data
		if (($row['id'] == $id) && ($row['type'] == $type))
		{
			$orig_order = $row['display_order'];
			$orig_type = $row['type'];
			break;
		}
	}

	$dest_order = 0;
	$dest_type = '';
	$dest_id = 0;
	if ($direction == "up")
	{
		if (!empty ($tree[$moduleid][$orig_order -1]))
		{
			$dest_order = $orig_order -1;
			$dest_type = $tree[$moduleid][$orig_order -1]['type'];
			$dest_id = $tree[$moduleid][$orig_order -1]['id'];
		}
		else
		{
			return false;
		}
	}
	else
	{
		//move down
		if (!empty ($tree[$moduleid][$orig_order +1]))
		{
			$dest_order = $orig_order +1;
			$dest_type = $tree[$moduleid][$orig_order +1]['type'];
			$dest_id = $tree[$moduleid][$orig_order +1]['id'];
		}
		else
		{
			return false;
		}
	}

	$sql1 = '';
	$sql2 = '';
	if ($orig_type == 'chapter')
	{
		$sql1 = "UPDATE $tbl_learnpath_chapter SET display_order = ".$dest_order." WHERE (id=$orig_id and parent_item_id=$moduleid)";
	}
	elseif ($orig_type == 'item')
	{
		$sql1 = "UPDATE $tbl_learnpath_item SET display_order = ".$dest_order." WHERE (id=$orig_id and parent_item_id=$moduleid)";
	}
	else
	{
		return false;
	}

	if ($dest_type == 'chapter')
	{
		$sql2 = "UPDATE $tbl_learnpath_chapter SET display_order = ".$orig_order." WHERE (id='$dest_id' and parent_item_id=$moduleid)";
	}
	elseif ($dest_type == 'item')
	{
		$sql2 = "UPDATE $tbl_learnpath_item SET display_order = ".$orig_order." WHERE (id='$dest_id' and parent_item_id=$moduleid)";
	}
	else
	{
		return false;
	}
	api_sql_query($sql1, __FILE__, __LINE__);
	api_sql_query($sql2, __FILE__, __LINE__);
}

/**
 * This function moves a module (also called chapter or category).
 *
 * @param   string $direction: move the given chapter up or down
 * @param   integer $id: the id of the chapter we want to move
 * @return	void 
 **/
function movemodule($direction, $id)
{
	global $learnpath_id;
	$tbl_learnpath_chapter = Database :: get_course_learnpath_chapter_table();
	if ($direction == "up")
	{
		$sortDirection = "DESC";
	}
	else
	{
		$sortDirection = "ASC";
	}

	// Select all chapters of first level (parent_item_id = 0)
	$sql = "SELECT * FROM $tbl_learnpath_chapter where (lp_id=$learnpath_id AND parent_item_id = 0) ORDER BY display_order $sortDirection";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$previousrow = "";

	// see similar comment in moveitem() function
	// @TODO: this only works for chapters in multi-level mode. Why not gather
	// this function and moveitem to keep only one multi-uses function?
	while ($row = mysql_fetch_array($result))
	{
		// step 2: performing the move (only happens when passed trhough step 1 at least once)
		if (!empty ($this_cat_order))
		{
			$next_cat_order = $row["display_order"];
			$next_cat_id = $row["id"];

			$sql1 = "UPDATE $tbl_learnpath_chapter SET display_order = '$next_cat_order' WHERE (id='$this_cat_id' and lp_id=$learnpath_id)";
			$sql2 = "UPDATE $tbl_learnpath_chapter SET display_order = '$this_cat_order' WHERE (id='$next_cat_id' and lp_id=$learnpath_id)";
			api_sql_query($sql1, __FILE__, __LINE__);
			api_sql_query($sql2, __FILE__, __LINE__);
			unset ($this_cat_order);
			unset ($this_cat_id);
			unset ($next_cat_order);
			unset ($next_cat_id);
			break;
		}

		// step 1: looking for the order of the row we want to move
		if ($row["id"] == $id)
		{
			$this_cat_order = $row["display_order"];
			$this_cat_id = $id;
		}
	}

}

/**
 * Inserts a new element in a learnpath table (item or chapter)
 * @param		string	Element type ('chapter' or 'item')
 * @param		string	Chapter name
 * @param		string	Chapter description (optional)
 * @param		integer	Parent chapter ID (default: 0)
 * @param		integer Learnpath ID 
 * @param		mixed		If type 'item', then array(prereq_id=>value, prereq_..)
 * @return	integer	The new chapter ID, or false on failure 
 * @TODO	Finish this function before it is used. Currently only chapters can be added using it.
 * @note This function is currently never used!
 */
function insert_item($type = 'item', $name, $chapter_description = '', $parent_id = 0, $learnpath_id = 0, $params = null)
{
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);

	// getting the last order number from the chapters table, in this learnpath, for the parent chapter given
	$sql = "SELECT * FROM $tbl_learnpath_chapter 
			WHERE lp_id=$learnpath_id 
			AND parent_item_id = $parent_id
			ORDER BY display_order DESC";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$row = mysql_fetch_array($result);
	$last_chapter_order = $row["display_order"];

	// getting the last order number of the items
	$sql = "SELECT * FROM $tbl_learnpath_item 
			AND parent_item_id = $parent_id
			ORDER BY display_order DESC";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$row = mysql_fetch_array($result);
	$last_item_order = $row["display_order"];
	$new_order = max($last_chapter_order, $last_item_order) + 1;

	if ($type === 'chapter')
	{
		$sql = "INSERT INTO $tbl_learnpath_chapter 
						(lp_id, chapter_name, chapter_description, display_order) 
						VALUES ('".domesticate($learnpath_id)."', 
						'".domesticate(htmlspecialchars($chapter_name))."',
						'".domesticate(htmlspecialchars($chapter_description))."', 
						$new_order )";
		$result = api_sql_query($sql, __FILE__, __LINE__);
		if ($result === false)
		{
			return false;
		}
		$id = Database :: get_last_insert_id();
	}
	elseif ($type === 'item')
	{
		$sql = "INSERT INTO $tbl_learnpath_item 
						(parent_item_id, item_type, item_id, display_order) 
						VALUES ('".domesticate($parent_id)."', 
						'".domesticate(htmlspecialchars($item_type))."',
						'".domesticate(htmlspecialchars($item_id))."', 
						$new_order )";
		$result = api_sql_query($sql, __FILE__, __LINE__);
		if ($result === false)
		{
			return false;
		}
		$id = Database :: get_last_insert_id();
	}
	return $id;
}

/**
 * This function returns an array with all the learnpath categories/chapters
 * @return array List of learnpath chapter titles
 **/
function array_learnpath_categories()
{
	#global $tbl_learnpath_chapter; 
	global $learnpath_id;
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);

	$sql = "SELECT * FROM  $tbl_learnpath_chapter  WHERE (lp_id=$learnpath_id) ORDER BY display_order ASC";
	$result = api_sql_query($sql, __FILE__, __LINE__);

	while ($row = mysql_fetch_array($result))
	{
		$array_learnpath_categories[] = array ($row["id"], $row["chapter_name"]);
	}
	//$array_learnpath_categories=array($array_learnpath_categories_name,$array_learnpath_categories_id);
	return $array_learnpath_categories;
}

/**
* Displays the learnpath chapters(=modules,categories) and their contents.
* @param    integer     Chapter ID to display now (enables recursive behaviour)
* @param    array       The array as returned by get_learnpath_tree, with all the elements of a learnpath compiled and structured into the array, by chapter id
* @param    integer     Level (the depth of the call - helps in display)
* @todo eliminate all global $lang declarations, use get_lang, improve structure.
* @author   Denes Nagy
* @author   Roan Embrechts
* @author   Yannick Warnier <yannick.warnier@dokeos.com> - complete redesign for multi-level learnpath chapters
*/
function display_learnpath_chapters($parent_item_id = 0, $tree = array (), $level = 0)
{
	//error_log('New LP - In learnpath_functions::display_learnpath_chapters',0);
	global $color2;
	global $xml_output;
	global $learnpath_id;
	$tbl_lp_item = Database::get_course_table('lp_item');
	
	
	// @todo: coding standards: Language variables are CaMMelCaSe, all other variables should use the underscoring method.
	$lang_move_down = get_lang('_move_down');
	$lang_move_up = get_lang('lang_move_up');
	$lang_edit_learnpath_module = get_lang('lang_edit_learnpath_module');
	$lang_delete_learnpath_module = get_lang('lang_delete_learnpath_module');
	$lang_nochapters = get_lang('lang_nochapters');
	$lang_prerequisites = get_lang('lang_prerequisites');
	$lang_prerequisites_limit = get_lang('lang_prerequisites_limit');
	$lang_add_learnpath_item = get_lang('lang_add_learnpath_item');
	$lang_add_item = get_lang('lang_add_item');
	$lang_title_and_desc = get_lang('lang_title_and_desc');
	$lang_change_order = get_lang('lang_change_order');
	$lang_add_prereqi = get_lang('lang_add_prereqi');
	$lang_add_title_and_desc = get_lang('lang_add_title_and_desc');
	$lang_delete = get_lang('Delete');

	if ($parent_item_id === 0)
	{
		// this is the first time we use the function, define the tree and display learnpath name

		$tree = get_learnpath_tree($learnpath_id);

		$num_modules = count($tree);
		//$num_modules=mysql_num_rows($result);
		if ($num_modules == 0)
		{
			// do not diplay useless information
			//echo "<tr><td>&nbsp;$lang_nochapters</td></tr>";
		}
		else
		{
			echo "  <tr align='center' valign='top'>\n"."    <td><b>&nbsp;$lang_title_and_desc </b></td>\n"."    <td><b>&nbsp;$lang_add_item </b></td>\n";
			if (is_prereq($learnpath_id))
			{
				echo "    <td bgcolor='#ddddee'><b>&nbsp;$lang_prerequisites_limit </b></td>\n";
			}
			else
				echo "    <td><b>&nbsp;$lang_prerequisites </b></td>\n";

			echo "    <td colspan='2'><b>&nbsp;$lang_change_order </b></td><td><b>&nbsp;$lang_add_prereqi </b></td>\n"."    <td><b>&nbsp;$lang_add_title_and_desc </b></td><td><b>&nbsp;$lang_delete </b></td>\n"."  </tr>\n";
		}
	}

	$i = 1;
	$counter = 0;
	$num_modules = count($tree[$parent_item_id]);

	//while ($row=mysql_fetch_array($result))
	if (isset ($tree[$parent_item_id]))
	{
		foreach ($tree[$parent_item_id] as $row)
		{
			if ($row['item_type'] === 'dokeos_chapter')
			{
				$xml_output .= "<chapter>";
				$xml_output .= "<chaptertitle>".$row["title"]."</chaptertitle>";
				$xml_output .= "<chapterdescription>".$row["description"]."</chapterdescription>";

				$counter ++;
				if (($counter % 2) == 0)
				{
					$oddclass = "row_odd";
				}
				else
				{
					$oddclass = "row_even";
				}

				//echo '<tr class="'.$oddclass.'">'."\n".'  <td>'.str_repeat("&nbsp;&gt;", $level)."<img src='../img/documents.gif' alt='folder'/><a href='".api_get_self()."?lp_id=$learnpath_id&item_id={$row['id']}&action=add&type=learnpathitem&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9'><b>&nbsp;".$row['title']."</b></a>"."<br /><i><div align='justify'>&nbsp;".str_repeat("&nbsp;&nbsp;&nbsp;", $level)."</i></td>\n".'  <td  align="center"><a href="'.api_get_self()."?lp_id=$learnpath_id&item_id={$row['id']}&action=add&type=learnpathitem&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9"><img src='../img/0.gif' width='13' height='13' border='0' title='$lang_add_learnpath_item'></a></td>\n"."  <td";
				echo '<tr class="'.$oddclass.'">'."\n".'  <td>'.str_repeat("&nbsp;&gt;", $level)."<img src='../img/documents.gif' alt='folder'/><a href='".api_get_self()."?lp_id=$learnpath_id&parent_item_id=".$row['id']."&action=add_sub_item'><b>&nbsp;".$row['title']."</b></a>"."<br /><i><div align='justify'>&nbsp;".str_repeat("&nbsp;&nbsp;&nbsp;", $level)."</i></td>\n".'  <td  align="center"><a href="'.api_get_self()."?lp_id=$learnpath_id&parent_item_id=".$row['id']."&action=add_sub_item\"><img src='../img/0.gif' width='13' height='13' border='0' title='$lang_add_learnpath_item'></a></td>\n"."  <td";
				if (is_prereq($learnpath_id))
				{
					echo " bgcolor='#ddddee'";
				}
				echo ">".$row['prerequisite']."</td>\n";

				// showing the edit, delete and move icons
				if (is_allowed_to_edit())
				{
					$myaction = 'move_item';
					if ($i < $num_modules)
					{

						// if we are still under the number of chapters in this section, show "move down"
						//echo "  <td align=center>"."<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=".$myaction."&amp;direction=down&amp;moduleid=".$parent_item_id."&amp;id=".$row["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/down.gif\" border=\"0\" title=\"$lang_move_down\">"."</a></td>\n";
						echo "  <td align=center>"."<a href='".api_get_self()."?lp_id=$learnpath_id&action=".$myaction."&direction=down&moduleid=".$parent_item_id."&id=".$row["id"]."'>"."<img src=\"../img/down.gif\" border=\"0\" title=\"$lang_move_down\">"."</a></td>\n";
					}
					else
					{
						echo '  <td align="center">&nbsp;</td>'."\n";
					}

					if ($i > 1)
					{
						//echo '  <td align="center">'."<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=".$myaction."&amp;direction=up&amp;moduleid=".$parent_item_id."&amp;id=".$row["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/up.gif\" border=\"0\" title=\"$lang_move_up\">"."</a>"."</td>\n";
						echo '  <td align="center">'."<a href='".api_get_self()."?lp_id=$learnpath_id&action=".$myaction."&direction=up&moduleid=".$parent_item_id."&id=".$row["id"]."'>"."<img src=\"../img/up.gif\" border=\"0\" title=\"$lang_move_up\">"."</a>"."</td>\n";
					}
					else
					{
						echo '  <td align="center">&nbsp;</td>'."\n";
					}

					echo "  <td align='center'>&nbsp;</td>\n";
					//echo "  <td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=editmodule&amp;id=".$row["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/edit.gif\" border=\"0\" title=\"$lang_edit_learnpath_module\">"."</a>"."</td>\n";
					echo "  <td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&action=edititem&id=".$row["id"]."'>"."<img src=\"../img/edit.gif\" border=\"0\" title=\"$lang_edit_learnpath_module\">"."</a>"."</td>\n";
					
					//echo "  <td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=deletemodule&amp;id=".$row["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9 onclick=\"return confirmation('".$row['chapter_name']."');\">"."<img src=\"../img/delete.gif\" border=\"0\" title=\"$lang_delete_learnpath_module\">"."</a>"."</td>\n";
					echo "  <td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&action=delete_item&id=".$row["id"]."' onclick=\"return confirmation('".$row['title']."');\">"."<img src=\"../img/delete.gif\" border=\"0\" title=\"$lang_delete_learnpath_module\">"."</a>"."</td>\n";
				}

				echo "</tr>\n";
				$i ++;

				$xml_output .= "<items>";

				#display_learnpath_items($row["id"]);
				display_learnpath_chapters($row['id'], $tree, $level +1);

				$xml_output .= "</items>";
				$xml_output .= "</chapter>";

			}
			else //if //($row['item_type'] === 'item')
			{
				$row_items = $row;
				echo "<tr>\n  <td colspan='2' valign='top'>";
				//require('resourcelinker.inc.php');
				display_addedresource_link_in_learnpath($row_items["item_type"], $row_items["ref"], '', $row_items["id"], 'builder', 'icon', $level);

				if ($row_items["description"])
				{
					echo "<div align='justify'><font color='#999999'>&nbsp;&nbsp;&nbsp;{$row_items['description']}</font>";
				}

				echo "</td>";

				if (is_prereq($learnpath_id))
				{
					echo '<td bgcolor="#EEEEFF">';
				}
				else
				{
					echo "<td>";
				}

				if (is_allowed_to_edit())
				{

					if ($row_items["prerequisite"] <> '')
					{
						$prereq = $row_items["prerequisite"];

						//if ($row_items["prereq_type"] == 'i')
						//{
							//item
							$sql_items2 = "SELECT * FROM $tbl_lp_item WHERE id='$prereq'"; //check if prereq has been deleted
							$result_items2 = api_sql_query($sql_items2, __FILE__, __LINE__);
							$number_items2 = Database::num_rows($result_items2);
							if ($number_items2 == 0)
							{
								echo "<font color='red'>$lang_prereq_deleted_error</font>";
							}
							$row_items2 = mysql_fetch_array($result_items2);
							display_addedresource_link_in_learnpath($row_items2["item_type"], $row_items2["ref"], '', $row_items2["id"], 'builder', '', 0);
							if ((($row_items2["item_type"] == TOOL_QUIZ) or ($row_items2["item_type"] == 'HotPotatoes')) and ($row_items['prerequisite']))
							{
								//echo "&nbsp;({$row_items2['title']})";
							}
						//}
						/*
						if ($row_items["prereq_type"] == 'c')
						{
							//chapter
							$sql_items2 = "SELECT * FROM $tbl_lp_item WHERE id='$prereq' AND item_type='dokeos_chapter'"; //check if prereq has been deleted
							$result_items2 = api_sql_query($sql_items2, __FILE__, __LINE__);
							$number_items2 = Database::num_rows($result_items2);
							if ($number_items2 == 0)
							{
								echo "<font color='red'>$lang_prereq_deleted_error</font>";
							}
							$row_items2 = mysql_fetch_array($result_items2);
							echo " {$row_items2['title']}";
						}*/
					}
					echo "</font></td>";
					$xml_output .= "<element_type>".$row_items["item_type"]."</element_type>";
					$xml_output .= "<element_id>".$row_items["item_id"]."</element_id>";

					// move
					if ($i < $num_modules)
					{
						echo "<td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=moveitem&amp;type=item&amp;direction=down&amp;moduleid=".$parent_item_id."&amp;id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/down.gif\" border=\"0\" title=\"$lang_move_down\">"."</a>"."</td>";
					}
					else
					{
						echo "<td width='30' align='center'>&nbsp;</td>";
					}

					if ($i > 1)
					{
						echo "<td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=moveitem&amp;type=item&amp;direction=up&amp;moduleid=".$parent_item_id."&amp;id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/up.gif\" border=\"0\" title=\"$lang_move_up\">"."</a>";
					}
					else
					{
						echo "<td width='30' align='center'>&nbsp;</td>";
					}
					echo "</td>"."<td align='center'>";

					// edit prereq
					echo "<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=edititemprereq&amp;id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/scormpre.gif\" border=\"0\" title=\"$lang_add_prereq\">"."</a>"."</td>";

					// edit
					echo "<td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&amp;action=edititem&amp;id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/edit.gif\" border=\"0\" title=\"$lang_edit_learnpath_item\">"."</a>"."</td>";

					// delete
					echo "<td align='center'>"."<a href='".api_get_self()."?lp_id=$learnpath_id&action=deleteitem&id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>"."<img src=\"../img/delete.gif\" border=\"0\" title=\"$lang_delete_learnpath_item\" onclick=\"return confirmation('".$row_items["item_type"]."');\">"."</a>";
				}
				$i ++;
				echo "</td></tr>";

			}
		}
	}
}

/**
 * Displays all learning paths.
 * @return	void
 * @todo eliminate all global $lang declarations, use get_lang, improve structure.
 */
function display_all_learnpath()
{
	global $tbl_tool, $color2;
	global $xml_output, $lang_edit_learnpath, $lang_delete_learnpath, $lang_publish, $lang_no_publish, $lang_add_learnpath_chapter_to_path;
	$tbl_learnpath_main = Database :: get_course_table(TABLE_LEARNPATH_MAIN);

	$sql = "SELECT * FROM  $tbl_learnpath_main  ORDER BY learnpath_name";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$i = 1;
	$num_modules = mysql_num_rows($result);

	while ($row = mysql_fetch_array($result))
	{
		//other grey color : #E6E6E6
		echo "<tr><td bgcolor=\"$color2\" width=400><b>&nbsp;";
		echo "<a href='learnpath_handler.php?&lp_id={$row['lp_id']}'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9>{$row['learnpath_name']}</a>";
		echo "</b><br><i><div class=text align=justify>{$row['learnpath_description']}</div></i></td>";

		// showing the edit, delete and publish icons
		if (is_allowed_to_edit())
		{
			echo "<td bgcolor=\"$color2\" align=center><a href='learnpath_handler.php?lp_id={$row['lp_id']}&action=add&type=learnpathcategory'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src='../img/0.gif' width='13' height='13' border='0' title='$lang_add_learnpath_chapter_to_path'></a></td>";
			echo "<td bgcolor=\"$color2\" align=center><a href='".api_get_self()."?action=editpath&id=".$row["lp_id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/edit.gif\" border=\"0\" title=\"$lang_edit_learnpath\"></a></td>";
			echo "<td bgcolor=\"$color2\" align=center><a href='".api_get_self()."?action=deletepath&id=".$row["lp_id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/delete.gif\" border=\"0\" title=\"$lang_delete_learnpath\" onclick=\"return confirmation('".$row2['learnpath_name']."');\"></a></td>";
			$id = $row["lp_id"];
			$sql2 = "SELECT * FROM $tbl_learnpath_main where lp_id=$id";
			$result2 = api_sql_query($sql2, __FILE__, __LINE__);
			$row2 = mysql_fetch_array($result2);
			$name = $row2['learnpath_name'];
			$sql3 = "SELECT * FROM $tbl_tool where (name=\"$name\" and image='scormbuilder.gif')";
			$result3 = api_sql_query($sql3, __FILE__, __LINE__);
			$row3 = mysql_fetch_array($result3);
			if (($row3["visibility"]) == '1')
			{
				echo "<td bgcolor=\"$color2\" align=center><a href='".api_get_self()."?action=publishpath&set=i&id=".$row["lp_id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/visible.gif\" border=\"0\" title=\"$lang_no_publish\"></a></td>";
			}
			else
			{
				echo "<td bgcolor=\"$color2\" align=center><a href='".api_get_self()."?action=publishpath&set=v&id=".$row["lp_id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/invisible.gif\" border=\"0\" title=\"$lang_publish\"></a></td>";
			}
		}
		$i ++;
		echo "<tr><td>&nbsp;</td></tr>";
	}
}

/**
 * Displays the learning path items/steps.
 * @param		integer		Category ID
 * @return	void
 * @todo eliminate all global $lang declarations, use get_lang, improve structure.
 */
function display_learnpath_items($categoryid)
{
	global $xml_output;
	global $lang_prerequisites, $lang_move_down, $lang_move_up, $lang_edit_learnpath_item, $lang_delete_learnpath_item, $learnpath_id, $lang_add_prereq, $lang_prereq_deleted_error, $lang_pre_short, $langThisItem;
	$tbl_lp_item = Database::get_course_table('lp_item');

	$sql_items = "SELECT * FROM $tbl_lp_item WHERE parent_item_id='$categoryid' ORDER BY display_order ASC";
	$result_items = api_sql_query($sql_items,__FILE__,__LINE__);
	$number_items = Database::num_rows($result_items);
	$i = 1;
	error_log('Selected item under '.$categoryid,0);

	while ($row_items = Database::fetch_array($result_items))
	{
		echo "<tr><td colspan='2' valign='top'>";
		display_addedresource_link_in_learnpath($row_items["item_type"], $row_items["ref"], '', $row_items["id"], 'builder', 'icon');
		if ($row_items["description"])
		{
			echo "<div align='justify'><font color='#999999'>&nbsp;&nbsp;&nbsp;{$row_items['description']}</font>";
		}
		echo "</td>";
		if (is_prereq($learnpath_id))
		{
			echo '<td bgcolor="#EEEEFF">';
		}
		else
		{
			echo "<td>";
		}

		if (is_allowed_to_edit())
		{
			error_log('Is allowed to edit item'.$row_items['id'],0);
			//TODO: fix by adding true prerequisites parsing (and cycle through)
			//Over simplification here, we transform prereq_id field into prerequisite field
			if ($row_items["prerequisite"] <> '')
			{
				$prereq = $row_items["prerequisite"];

				//if ($row_items["prereq_type"] == 'i')
				//{
					//item
					$sql_items2 = "SELECT * FROM $tbl_lp_item WHERE id='$prereq'"; //check if prereq has been deleted
					$result_items2 = api_sql_query($sql_items2);
					$number_items2 = Database::num_rows($result_items2);
					if ($number_items2 == 0)
					{
						echo "<font color=red>$lang_prereq_deleted_error</font>";
					}
					$row_items2 = Database::fetch_array($result_items2);
					display_addedresource_link_in_learnpath($row_items2["item_type"], $row_items2["ref"], '', $row_items2["id"], 'builder', '');
					if ((($row_items2["item_type"] == 'Exercise') or ($row_items2["item_type"] == 'HotPotatoes')) and ($row_items['prerequisites']))
					{
						echo "&nbsp;({$row_items2['title']})";
					}
				//}
				/*if ($row_items["prereq_type"] == 'c')
				{
					//chapter
					$sql_items2 = "SELECT * FROM $tbl_learnpath_chapter WHERE id='$prereq'"; //check if prereq has been deleted
					$result_items2 = api_sql_query($sql_items2,__FILE__,__LINE__);
					$number_items2 = Database::num_rows($result_items2);
					if ($number_items2 == 0)
					{
						echo "<font color=red>$lang_prereq_deleted_error</font>";
					}
					$row_items2 = Database::fetch_array($result_items2);
					echo " {$row_items2['chapter_name']}";
				}*/
			}
			echo "</font></td>";
			$xml_output .= "<element_type>".$row_items["item_type"]."</element_type>";
			$xml_output .= "<element_id>".$row_items["id"]."</element_id>";

			// move
			if ($i < $number_items)
			{
				echo "<td align='center'><a href='".api_get_self()."?lp_id=$learnpath_id&action=moveitem&direction=down&moduleid=".$categoryid."&id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/down.gif\" border=\"0\" title=\"$lang_move_down\"></a></td>";
			}
			else
			{
				echo "<td width='30' align='center'>&nbsp;</td>";
			}

			if ($i > 1)
			{
				echo "<td align='center'><a href='".api_get_self()."?lp_id=$learnpath_id&action=moveitem&direction=up&moduleid=".$categoryid."&id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/up.gif\" border=\"0\" title=\"$lang_move_up\"></a>";
			}
			else
			{
				echo "<td width='30' align='center'>&nbsp;</td>";
			}
			echo "</td><td align='center'>";

			// edit prereq
			echo "<a href='".api_get_self()."?lp_id=$learnpath_id&action=edititemprereq&id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/scormpre.gif\" border=\"0\" title=\"$lang_add_prereq\"></a></td>";

			// edit
			echo "<td align='center'><a href='".api_get_self()."?lp_id=$learnpath_id&action=edititem&id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/edit.gif\" border=\"0\" title=\"$lang_edit_learnpath_item\"></a></td>";

			// delete
			echo "<td align='center'>";
			echo "<a href='".api_get_self()."?lp_id=$learnpath_id&action=deleteitem&id=".$row_items["id"]."'&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9><img src=\"../img/delete.gif\" border=\"0\" title=\"$lang_delete_learnpath_item\" onclick=\"return confirmation('".$langThisItem."');\"></a>";
		}
		$i ++;
		echo "</td></tr>";
	}
}

/**
 * This function returns the items belonging to the chapter that contains the given item (brother items)
 * @param	integer	Item id
 * @return	array		Table containing the items
 */
function learnpath_items($itemid)
{
	global $xml_output;
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);

	$sql_items = "SELECT parent_item_id FROM $tbl_lp_item WHERE id='$itemid'";
	$moduleid_sql = api_sql_query($sql_items);
	$moduleid_array = mysql_fetch_array($moduleid_sql); //first row of the results
	$moduleid = $moduleid_array["parent_item_id"];

	$sql_items = "SELECT * FROM $tbl_lp_item WHERE parent_item_id='$moduleid' ORDER BY display_order ASC";
	$result_items = api_sql_query($sql_items);
	$ar = mysql_fetch_array($result_items);
	while ($ar != '')
	{
		$result[] = $ar;
		$ar = mysql_fetch_array($result_items);
	}
	return $result;

}

/**
 * This function returns the chapters belonging to the path that contais the given chapter (brother chapters)
 * @param	integer	Learnpath id
 * @return array		Table containing the chapters
 */
function learnpath_chapters($learnpath_id)
{
	global $xml_output, $learnpath_id;
	//$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);
	$tbl_lp_item = Database::get_course_table('lp_item');
	

	$sql_items = "SELECT * FROM $tbl_lp_item WHERE lp_id='$learnpath_id' AND item_type='dokeos_chapter' ORDER BY display_order ASC";
	//$sql_items = "SELECT * FROM $tbl_learnpath_chapter WHERE lp_id='$learnpath_id' ORDER BY display_order ASC";
	$result_items = api_sql_query($sql_items, __FILE__, __LINE__);
	$ar = mysql_fetch_array($result_items);
	while ($ar != '')
	{
		$result[] = $ar;
		$ar = mysql_fetch_array($result_items);
	}
	return $result;

}

/**
 * This function tells if a learnpath contains items which are prerequisite to other items
 * @param	integer	Learnpath id
 * @return	boolean	True if this learnpath contains an item which is a prerequisite to something
 */
function is_prereq($learnpath_id)
{
	global $xml_output;
	$tbl_lp_item = Database::get_course_table('lp_item');
	
	$prereq = false;

	$sql_items = "SELECT * FROM $tbl_lp_item WHERE lp_id='$learnpath_id' AND parent_item_id=0 ORDER BY display_order ASC";
	$result_items = api_sql_query($sql_items,__FILE__,__LINE__);
	while ($ar = Database::fetch_array($result_items))
	{
		$c = $ar['id'];
		$sql_items2 = "SELECT * FROM $tbl_lp_item WHERE lp_id = $learnpath_id AND parent_item_id='$c' ORDER BY display_order ASC";
		$result_items2 = api_sql_query($sql_items2,__FILE__,__LINE__);
		while ($ar2 = Database::fetch_array($result_items2))
		{
			if ($ar2['prerequisite'] != '')
			{
				$prereq = true;
			}
		}
	}
	return ($prereq);
}

/**
 * This function returns the prerequisite sentence
 * @param	integer	Item ID
 * @return	string 	Prerequisite warning text
 */
function prereqcheck($id_in_path)
{
	//1 Initialise and import working vars
	global $learnpath_id, $_user;
	global $langPrereqToEnter, $langPrereqTestLimit1, $langPrereqTestLimit2, $langPrereqTestLimitNow, $langPrereqFirstNeedTo, $langPrereqModuleMinimum1, $langPrereqModuleMinimum2;
	$tbl_learnpath_user = Database :: get_course_table(TABLE_LEARNPATH_USER);
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);

	//2 Initialise return value
	$prereq = false;

	//3 Get item data from the database
	$sql_items = "SELECT * FROM $tbl_learnpath_item WHERE id='$id_in_path'";
	$result_items = api_sql_query($sql_items);
	$row = mysql_fetch_array($result_items);
	//4 Check prerequisite's type
	if ($row['prereq_type'] == 'i')
	{
		//4.a If prerequisite is of type 'i' (item)
		//4.a.1 Get data ready for use
		$id_in_path3 = $row['prereq_id'];
		$prereq_limit = $row['prereq_completion_limit'];

		//4.a.2 Get data from the user-item relation
		if ($_user['user_id'] == '')
		{
			$user_id = '0';
		}
		else
		{
			$user_id = $_user['user_id'];
		}
		$sql_items3 = "SELECT * FROM $tbl_learnpath_user WHERE (learnpath_item_id='$id_in_path3' and user_id=$user_id)";
		$result_items3 = api_sql_query($sql_items3);
		$row3 = mysql_fetch_array($result_items3);

		//4.a.3 Get the link that needs to be shown for the current item (not the prereq)
		$stepname = display_addedresource_link_in_learnpath($row['item_type'], $row['ref'], '', $id_in_path, 'builder', 'nolink');
		//this is the step we want to open
		$stepname = trim($stepname); //to remove occasional line breaks and white spaces

		//4.a.4 Get the prerequisite item
		$sql6 = "SELECT * FROM $tbl_learnpath_item WHERE (id='$id_in_path3')";
		$result6 = api_sql_query($sql6);
		$row6 = mysql_fetch_array($result6);
		//4.a.5 Get a link to the prerequisite item
		$prereqname = display_addedresource_link_in_learnpath($row6['item_type'], $row6['ref'], '', $id_in_path3, 'builder', 'nolink'); //this is the prereq of the step we want to open

		//4.a.5 Initialise limit value
		$limitok = true;
		//4.a.6 Get prerequisite limit
		if ($prereq_limit)
		{
			//4.a.6.a If the completion limit exists
			if ($row3['score'] < $prereq_limit)
			{
				//4.a.6.a.a If the completion limit hasn't been reached, then display the corresponding message
				$prereq = $langPrereqToEnter.$stepname.$langPrereqTestLimit1."$prereq_limit".$langPrereqTestLimit2.$prereqname.". (".$langPrereqTestLimitNow.$row3['score'].")";
			}
			else
			{
				//4.a.6.a.b The completion limit has been reached. Prepare to return false (no prereq hanging)
				$prereq = false;
			}
		}
		else
		{
			//4.a.6.b If the completion limit doesn't exist
			if ($row3['status'] == "completed" or $row3['status'] == 'passed')
			{
				//4.a.6.b.a If the prerequisite status is 'completed'
				$prereq = false;
			}
			else
			{
				//4.a.6.b.b The prerequisite status is not 'completed', return corresponding message
				$prereq = $langPrereqToEnter.$stepname.$langPrereqFirstNeedTo.$prereqname.'.';
			}
		}

	}
	elseif ($row['prereq_type'] == 'c')
	{
		//4.b If prerequisite is of type 'c' (chapter)
		//4.b.1 Get data ready to use
		$id_in_path2 = $row['prereq_id'];
		//4.b.2 Get all items in the prerequisite chapter
		$sql_items3 = "SELECT * FROM $tbl_lp_item WHERE parent_item_id='$id_in_path2'";
		$result_items3 = api_sql_query($sql_items3);
		$allcompleted = true;
		while ($row3 = mysql_fetch_array($result_items3))
		{
			//4.b.3 Cycle through items in the prerequisite chapter
			//4.b.3.1 Get data ready to use
			$id_in_path4 = $row3['id'];
			if ($_user['user_id'] == '')
			{
				$user_id = '0';
			}
			else
			{
				$user_id = $_user['user_id'];
			}
			//4.b.3.2 Get user-item relation
			$sql_items4 = "SELECT * FROM $tbl_learnpath_user WHERE (learnpath_item_id='$id_in_path4' and user_id=$user_id)";
			$result_items4 = api_sql_query($sql_items4);
			$row4 = mysql_fetch_array($result_items4);
			//4.b.3.3 If any of these elements is not 'completed', the overall completion status is false
			if ($row4['status'] != "completed" and $row4['status'] != 'passed')
			{
				$allcompleted = false;
			}
		}
		if ($allcompleted)
		{
			//4.b.4.a All items were completed, prepare to return that there is no prerequisite blocking the way
			$prereq = false;
		}
		else
		{
			//4.b.4.b Something was not completed. Return corresponding message
			$sql5 = "SELECT * FROM $tbl_learnpath_chapter WHERE (lp_id='$learnpath_id' and id='$id_in_path2')";
			$result5 = api_sql_query($sql5);
			$row5 = mysql_fetch_array($result5);
			$prereqmodulename = trim($row5['chapter_name']);
			$prereq = $langPrereqModuleMinimum1.$prereqmodulename.$langPrereqModuleMinimum2;
		}
	}
	else
	{
		//5 If prerequisite type undefined, no prereq
		$prereq = false;
	}
	//6 Return the message (or false if no prerequisite waiting)
	return ($prereq);
}

/**
 * Constructs the tree that will be used to build the learnpath structure
 * @params  integer     Learnpath_id
 * @return  array       Tree of the learnpath structure
 * @author  Yannick Warnier <yannick.warnier@dokeos.com>
 * @comment This is a temporary function, which exists while the chapters and items
 *          are still in separate tables in the database. This function gathers the data in a unique tree.
 **/
function get_learnpath_tree($learnpath_id)
{
	//error_log('New LP - In learnpath_functions::get_learnpath_tree',0);
	//init elems
	#global $tbl_learnpath_item, $tbl_learnpath_chapter; 
	/*
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);
	*/
	$tbl_lp_item = Database::get_course_table('lp_item');

	$tree = array ();
	$chapters = array ();
	//$chapters = array();
	//$chapters_by_parent = array();
	//$items = array();
	//$items_by_chapter = array();
	$all_items_by_chapter = array ();
	$sql = "SELECT * FROM $tbl_lp_item WHERE lp_id = ".$learnpath_id." AND item_type='dokeos_chapter' ORDER BY display_order";
	//error_log('New LP - learnpath_functions - get_learnpath_tree: '.$sql,0);
	$res = api_sql_query($sql, __FILE__, __LINE__);
	// format the $chapters_by_parent array so we have a suitable structure to work with
	while ($row = Database::fetch_array($res))
	{
		$chapters[] = $row;
		//shouldn't be necessary (check no null value)
		if (empty ($row['parent_item_id']))
		{
			$row['parent_item_id'] = 0;
		}
		//$chapters_by_parent[$row['parent_item_id']][$row['previous_item_id']] = $row;
		$all_items_by_chapter[$row['parent_item_id']][$row['display_order']] = $row;
		$all_items_by_chapter[$row['parent_item_id']][$row['display_order']]['type'] = 'dokeos_chapter';
	}

	// now for every item in each chapter, get a suitable structure too
	foreach ($chapters as $row)
	{
		// select items from this chapter
		$sql = "SELECT * FROM $tbl_lp_item WHERE lp_id = $learnpath_id AND parent_item_id = ".$row['id']." ORDER BY display_order";
		//error_log('New LP - learnpath_functions - get_learnpath_tree: '.$sql,0);
		$res = api_sql_query($sql, __FILE__, __LINE__);
		//error_log('New LP - learnpath_functions - get_learnpath_tree: Found '.Database::num_rows($res).' results',0);
		while ($myrow = mysql_fetch_array($res, MYSQL_ASSOC))
		{
			//$items[] = $myrow;
			//$items_by_chapter[$myrow['parent_item_id']][$myrow['display_order']] = $myrow;
			$all_items_by_chapter[$row['id']][$myrow['display_order']] = $myrow;
			$all_items_by_chapter[$row['id']][$myrow['display_order']]['type'] = 'item';
		}
	}
	//array_multisort($all_items_by_chapter[0], SORT_ASC, SORT_NUMERIC);
	foreach ($all_items_by_chapter as $key => $subrow)
	{
		ksort($all_items_by_chapter[$key]);
	}

	//all items should now be well-ordered
	//error_log('New LP - In get_learnpath_tree, returning '.print_r($all_items_by_chapter,true),0);
	return $all_items_by_chapter;
}

/**
 * Gives a list of sequencial elements IDs for next/previous actions
 * @param   array   The elements tree as returned by get_learnpath_tree()
 * @param   integer The chapter id to start from
 * @param   boolean Whether to include chapters or not
 * @return  array   List of elements in the first to last order
 * @author  Yannick Warnier <yannick.warnier@dokeos.com>
 **/
function get_ordered_items_list($tree, $chapter = 0, $include_chapters = false)
{
	$list = array ();
	foreach ($tree[$chapter] as $order => $elem)
	{
		if ($elem['type'] == 'chapter')
		{
			if ($include_chapters === true)
			{
				$list[] = array ('id' => $elem['id'], 'type' => $elem['type']);
			}
			$res = get_ordered_items_list($tree, $elem['id'], $include_chapters);
			foreach ($res as $elem)
			{
				$list[] = $elem;
			}
		}
		elseif ($elem['type'] == 'item')
		{
			$list[] = array ('id' => $elem['id'], 'type' => $elem['type'], 'item_type' => $elem['item_type'], 'parent_item_id' => $elem['parent_item_id'], 'item_id' => $elem['item_id']);
		}
	}
	return $list;
}

/**
 * Displays the structure of a chapter recursively. Takes the result of get_learnpath_tree as argument 
 * @param	array		Chapter structure
 * @param	integer	Chapter ID (start point in the tree)
 * @param	integer	Learnpath ID 
 * @param	integer	User ID
 * @param	boolean	Indicates if the style is wrapped (true) or extended (false) 
 * @param	integer	Level reached so far in the tree depth (enables recursive behaviour)
 * @return	array		Number of items, Number of items completed
 * @author	Many changes by Yannick Warnier <yannick.warnier@dokeos.com> 
 **/
function display_toc_chapter_contents($tree, $parent_item_id = 0, $learnpath_id, $uid, $wrap, $level = 0)
{
		#global $tbl_learnpath_user;
	$tbl_learnpath_user = Database :: get_course_table(TABLE_LEARNPATH_USER);
	$num = 0;
	$num_completed = 0;
	foreach ($tree[$parent_item_id] as $order => $elem)
	{

		$bold = false;
		if (!empty ($_SESSION['cur_open']) && ($elem['id'] == $_SESSION['cur_open']))
		{
			$bold = true;
		}
		if ($elem['type'] === 'chapter')
		{
			if ($wrap)
			{
				echo str_repeat("&nbsp;&nbsp;", $level).shorten(strip_tags($elem['chapter_name']), (35 - 3 * $level))."<br />\n";
			}
			else
			{
				echo "<tr><td colspan='3'>".str_repeat("&nbsp;&nbsp;", $level).shorten($elem['chapter_name'], (35 - 3 * $level))."</td></tr>\n";
			}

			if ($wrap)
			{
				if ($elem['chapter_description'] != '')
				{
					echo "<div class='description'>".str_repeat("&nbsp;&nbsp;", $level)."&nbsp;".shorten($elem['chapter_description'], (35 - 3 * $level))."</div>\n";
				}
			}
			else
			{
				if ($elem['chapter_description'] != '')
				{
					echo "<tr><td colspan='3'><div class='description'>".str_repeat("&nbsp;&nbsp;", $level)."&nbsp;".shorten($elem['chapter_description'], (35 - 3 * $level))."</div></td></tr>\n";
				}
			}
			list ($a, $b) = display_toc_chapter_contents($tree, $elem['id'], $learnpath_id, $uid, $wrap, $level +1);
			$num += $a;
			$num_completed += $b;

		}
		elseif ($elem['type'] === 'item')
		{
			// If this element is an item (understand: not a directory/module)
			$sql0 = "SELECT * FROM $tbl_learnpath_user WHERE (user_id='".$uid."' and learnpath_item_id='".$elem['id']."' and lp_id='".$learnpath_id."')";
			$result0 = api_sql_query($sql0, __FILE__, __LINE__);
			$row0 = mysql_fetch_array($result0);

			$completed = '';
			if (($row0['status'] == 'completed') or ($row0['status'] == 'passed'))
			{
				$completed = 'completed';
				$num_completed ++;
			}

			if ($wrap)
			{
				echo str_repeat("&nbsp;&nbsp;", $level)."<a name='{$elem['id']}' />\n";
			}
			else
			{
				echo "<tr><td>".str_repeat("&nbsp;&nbsp;", $level-1)."<a name='{$elem['id']}' />\n";
			}

			if ($wrap)
			{
				$icon = 'wrap';
			}

			if ($bold)
			{
				echo "<b>";
			}
			display_addedresource_link_in_learnpath($elem['item_type'], $elem['ref'], $completed, $elem['id'], 'player', $icon);
			if ($bold)
			{
				echo "</b>";
			}
			if ($wrap)
			{
				echo "<br />\n";
			}
			else
			{
				echo "</td></tr>\n";
			}

			$num ++;
		}
	}
	return array ($num, $num_completed);
}

/**
 * Returns a string to display in the tracking frame within the contents.php page (for example)
 * @param   integer     Learnpath id
 * @param   integer     Current user id
 * @param   integer     Starting chapter id
 * @param   array       Tree of elements as returned by get_learnpath_tree()
 * @param   integer     Level of recursivity we have reached
 * @param   integer     Counter of elements already displayed
 * @author  Yannick Warnier <yannick.warnier@dokeos.com>
 * @note : forced display because of display_addedresource_link_in_learnpath behaviour (outputing a string would be better)
 **/
function get_tracking_table($learnpath_id, $user_id, $parent_item_id = 0, $tree = false, $level = 0, $counter = 0)
{
	$tbl_learnpath_chapter = Database :: get_course_learnpath_chapter_table();
	$tbl_learnpath_item = Database :: get_course_learnpath_item_table();
	$tbl_learnpath_user = Database :: get_course_learnpath_user_table();
	//$mytable = '';
	$include_chapters = true;

	if (!is_array($tree))
	{
		//get a tree of the current learnpath elements
		$tree = get_learnpath_tree($learnpath_id);
	}
	foreach ($tree[$parent_item_id] as $order => $elem)
	{
		if (($counter % 2) == 0)
		{
			$oddclass = 'row_odd';
		}
		else
		{
			$oddclass = 'row_even';
		}

		if ($elem['type'] == 'chapter')
		{
			if ($include_chapters === true)
			{
				//$mytable .= "<tr class='$oddclass'><td colspan = '3'>".str_repeat('&nbsp;',$level*2+2).$elem['chapter_name']."</td></tr>\n";
				echo "<tr class='$oddclass'><td colspan = '3'>".str_repeat('&nbsp;', $level * 2 + 2).$elem['chapter_name']."</td></tr>\n";
			}
			$counter ++;
			//$mytable .= get_tracking_table($learnpath_id, $user_id, $elem['id'], $tree, $level + 1, $counter );
			get_tracking_table($learnpath_id, $user_id, $elem['id'], $tree, $level +1, $counter);

		}
		elseif ($elem['type'] == 'item')
		{

			$sql = "SELECT * FROM $tbl_learnpath_user "."WHERE user_id = $user_id "."AND lp_id = $learnpath_id "."AND learnpath_item_id = ".$elem['id'];
			$res = api_sql_query($sql, __FILE__, __LINE__);
			$myrow = mysql_fetch_array($res);

			if (($myrow['status'] == 'completed') || ($myrow['status'] == 'passed'))
			{
				$color = 'blue';
				$statusmessage = get_lang('Complete');
			}
			else
			{
				$color = 'black';
				$statusmessage = get_lang('Incomplete');
			}

			$link = get_addedresource_link_in_learnpath($elem['item_type'], $elem['id'], $elem['item_id']);
			//$link = display_addedresource_link_in_learnpath($elem['item_type'], $elem['id'], $row['status'], $elem['item_id'], 'player', 'none');

			//$mytable .= "<tr class='$oddclass'>"
			echo "<tr class='$oddclass'>"."<td class='mystatus'>".str_repeat("&nbsp;", $level * 2 + 2);
			//."<a href='$link?SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9' target='toc'>hop</a>"
			display_addedresource_link_in_learnpath($elem['item_type'], $elem['ref'], $myrow['status'], $elem['id'], 'player', 'wrap');
			//we should also add the total score here
			echo "<td>"."<font color='$color'><div class='mystatus'>".$statusmessage."</div></font>"."</td>"."<td>"."<div class='mystatus' align='center'>". ($myrow['score'] == 0 ? '-' : $myrow['score'])."</div>"."</td>"."</tr>\n";
			$counter ++;
		}
	}
	//return $mytable;
	return true;
}

/**
 * This function returns false if there is at least one item in the path
 * @param	Learnpath ID
 * @return	boolean	True if nothing was found, false otherwise 
 */
function is_empty($id)
{
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);

	$sql = "SELECT * FROM $tbl_learnpath_chapter WHERE lp_id=$id ORDER BY display_order ASC";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$num_modules = mysql_num_rows($result);
	$empty = true;

	if ($num_modules != 0)
	{
		while ($row = mysql_fetch_array($result))
		{

			$num_items = 0;
			$parent_item_id = $row['id'];
			$sql2 = "SELECT * FROM $tbl_learnpath_item WHERE (parent_item_id=$parent_item_id) ORDER BY display_order ASC";
			$result2 = api_sql_query($sql2, __FILE__, __LINE__);
			$num_items = mysql_num_rows($result2);
			if ($num_items > 0)
			{
				$empty = false;
			}

		}
	}

	return ($empty);

}

/**
 * This function writes $content to $filename   
 * @param	string	Destination filename
 * @param	string	Learnpath name
 * @param	integer	Learnpath ID
 * @param	string	Content to write
 * @return	void 
 */
function exporttofile($filename, $LPname, $LPid, $content)
{

	global $circle1_files; //this keeps all the files which are exported [0]:filename [1]:LP name
	//the $circle1_files variable is going to be used to a deep extent in the imsmanifest.xml
	global $expdir;

	if (!$handle = fopen($expdir.'/'.$filename, 'w'))
	{
		echo "Cannot open file ($filename)";
	}
	if (fwrite($handle, $content) === FALSE)
	{
		echo "Cannot write to file ($filename)";
		exit;
	}
	fclose($handle);

	$circle1_files[0][] = $filename;
	$circle1_files[1][] = $LPname;
	$circle1_files[2][] = $LPid;

}

/**
 * This function exports the given Dokeos test
 * @param	integer	Test ID
 * @return string 	The test itself as an HTML string
 */
function export_exercise($item_id)
{

	global $expdir, $_course, $_configuration, $_SESSION, $_SERVER, $language_interface, $langExerciseNotFound, $langQuestion, $langOk;

	$exerciseId = $item_id;

	require_once ('../exercice/exercise.class.php');
	require_once ('../exercice/question.class.php');
	require_once ('../exercice/answer.class.php');
	require_once ('../exercice/exercise.lib.php');

	// answer types
	define('UNIQUE_ANSWER', 1);
	define('MULTIPLE_ANSWER', 2);
	define('FILL_IN_BLANKS', 3);
	define('MATCHING', 4);
	define('FREE_ANSWER', 5);

	include_once (api_get_path(LIBRARY_PATH).'/text.lib.php');

	$TBL_EXERCISES = Database :: get_course_table(TABLE_QUIZ_TEST);

	/*******************************/
	/* Clears the exercise session */
	/*******************************/
	if (isset ($_SESSION['objExercise']))
	{
		api_session_unregister('objExercise');
		unset ($objExercise);
	}
	if (isset ($_SESSION['objQuestion']))
	{
		api_session_unregister('objQuestion');
		unset ($objQuestion);
	}
	if (isset ($_SESSION['objAnswer']))
	{
		api_session_unregister('objAnswer');
		unset ($objAnswer);
	}
	if (isset ($_SESSION['questionList']))
	{
		api_session_unregister('questionList');
		unset ($questionList);
	}
	if (isset ($_SESSION['exerciseResult']))
	{
		api_session_unregister('exerciseResult');
		unset ($exerciseResult);
	}

	// if the object is not in the session
	if (!isset ($_SESSION['objExercise']))
	{
		// construction of Exercise
		$objExercise = new Exercise();

		$sql = "SELECT title,description,sound,type,random,active FROM $TBL_EXERCISES WHERE id='$exerciseId'";
		// if the specified exercise doesn't exist or is disabled
		if (!$objExercise->read($exerciseId) || (!$objExercise->selectStatus() && !$is_allowedToEdit && ($origin != 'learnpath')))
		{
			die($langExerciseNotFound);
		}

		// saves the object into the session
		api_session_register('objExercise');
	}

	$exerciseTitle = $objExercise->selectTitle();
	$exerciseDescription = $objExercise->selectDescription();
	$exerciseSound = $objExercise->selectSound();
	$randomQuestions = $objExercise->isRandom();
	$exerciseType = $objExercise->selectType();

	if (!isset ($_SESSION['questionList']))
	{
		// selects the list of question ID
		$questionList = $randomQuestions ? $objExercise->selectRandomList() : $objExercise->selectQuestionList();

		// saves the question list into the session
		api_session_register('questionList');
	}

	$nbrQuestions = sizeof($questionList);

	// if questionNum comes from POST and not from GET
	if (!$questionNum || $_POST['questionNum'])
	{
		// only used for sequential exercises (see $exerciseType)
		if (!$questionNum)
		{
			$questionNum = 1;
		}
		else
		{
			$questionNum ++;
		}
	}

	$exerciseTitle = api_parse_tex($exerciseTitle);

	$test .= "<h3>".$exerciseTitle."</h3>";

	if (!empty ($exerciseSound))
	{
		$test .= "<a href=\"../document/download.php?doc_url=%2Faudio%2F".$exerciseSound."\"&SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9 target=\"_blank\"><img src=\"../img/sound.gif\" border=\"0\" align=\"absmiddle\" alt=".get_lang("Sound")."\" /></a>";
	}

	$exerciseDescription = api_parse_tex($exerciseDescription);

	// --------- writing the .js file with to check the correct answers begin -----------------------
	$scriptfilename = "Exercice".$item_id.".js";
	$s = "<script type=\"text/javascript\" src='../js/".$scriptfilename."'></script>";
	$test .= $s;

	$content = "function evaluate() {
		alert('Test evaluated.');
		}
		";

	if (!$handle = fopen($expdir.'/js/'.$scriptfilename, 'w'))
	{
		echo "Cannot open file ($scriptfilename)";
	}
	if (fwrite($handle, $content) === FALSE)
	{
		echo "Cannot write to file ($filename)";
		exit;
	}
	fclose($handle);
	// --------- writing the .js file with to check the correct answers end -----------------------

	$s = "
		<p>$exerciseDescription</p>
		<table width='100%' border='0' cellpadding='1' cellspacing='0'>
		 <form method='post' action=''><input type=\"hidden\" name=\"SQMSESSID\" value=\"36812c2dea7d8d6e708d5e6a2f09b0b9\" />
		 <input type='hidden' name='formSent' value='1' />
		 <input type='hidden' name='exerciseType' value='".$exerciseType."' />
		 <input type='hidden' name='questionNum' value='".$questionNum."' />
		 <input type='hidden' name='nbrQuestions' value='".$nbrQuestions."' />
		 <tr>
		  <td>
		  <table width='100%' cellpadding='4' cellspacing='2' border='0'>";

	$exerciseType = 1; //so to list all questions in one page
	$test .= $s;

	$i = 0;

	foreach ($questionList as $questionId)
	{
		$i ++;

		// for sequential exercises
		if ($exerciseType == 2)
		{
			// if it is not the right question, goes to the next loop iteration
			if ($questionNum != $i)
			{
				continue;
			}
			else
			{
				// if the user has already answered this question
				if (isset ($exerciseResult[$questionId]))
				{
					// construction of the Question object
					$objQuestionTmp = new Question();

					// reads question informations
					$objQuestionTmp->read($questionId);

					$questionName = $objQuestionTmp->selectTitle();

					// destruction of the Question object
					unset ($objQuestionTmp);

					$test .= '<tr><td>'.get_lang("AlreadyAnswered").' &quot;'.$questionName.'&quot;</td></tr>';

					break;
				}
			}
		}

		$s = "<tr bgcolor='#e6e6e6'><td valign='top' colspan='2'>".$langQuestion." ";
		$s .= $i;
		if ($exerciseType == 2)
			$s .= ' / '.$nbrQuestions;
		$s .= '</td></tr>';

		$test .= $s;

		//Call the showQuestion() function from exercise.lib.php. This basically displays the question in a table
		$test .= showQuestion($questionId, false, 'export');

	} // end foreach()

	$s = "</table></td></tr><tr><td><br/><input type='button' value='".$langOk."' onClick=\"javascript:evaluate();alert('Evaluated.');\">";

	$s .= "</td></tr></form></table>";
	$s .= "<script type='text/javascript'> loadPage(); </script>";

	$b = 2;

	$test .= $s;

	return ($test);

}

/**
 * This function exports the given item
 * @param	integer	Id from learnpath_items table
 * @param	integer	Item id
 * @param	string	Itm type
 * @param	boolean	Shall the SCORM communications features be added? (true). Default: false. 
 * @return	void (outputs a zip file)
 * @todo	Try using the SCORM communications addition (adding a button and several javascript calls to the SCORM API) elsewhere than just in the export feature, so it doesn't look like an incoherent feature 
 */

function exportitem($id, $item_id, $item_type, $add_scorm_communications = false)
{

	global $circle1_files, $expdir, $_course, $_SESSION, $GLOBALS;

	global $timeNoSecFormat, $dateFormatLong, $language_interface, $langPubl, $langDone, $langThisCourseDescriptionIsEmpty, $lang_course_description, $lang_introduction_text, $_cid, $langHotPotatoesFinished, $lang_author, $lang_date, $lang_groups, $lang_users, $lang_ass, $lang_dropbox, $test, $langQuestion;

	//	$_course=$_SESSION['course'];
	require_once (api_get_path(LIBRARY_PATH)."database.lib.php");
	//$tbl_learnpath_item     = Database::get_course_learnpath_item_table();

	include_once ('exercise.class.php');
	include_once ('question.class.php');
	include_once ('answer.class.php');
	include_once ('exercise.lib.php');

	include_once ('../lang/english/announcements.inc.php'); //this line is here only for $langPubl in announcements
	include_once ("../lang/".$language_interface."/announcements.inc.php"); //this line is here only for $langPubl in announcements
	include_once ('../lang/english/course_description.inc.php'); //this line is here only for $langThisCourseDescriptionIsEmpty
	include_once ("../lang/".$language_interface."/course_description.inc.php"); //				 -||-
	include_once ('../lang/english/resourcelinker.inc.php');
	include_once ("../lang/".$language_interface."/resourcelinker.inc.php");
	include_once ('../lang/english/learnpath.inc.php');
	include_once ("../lang/".$language_interface."/learnpath.inc.php");
	include_once ('../lang/english/exercice.inc.php');
	include_once ("../lang/".$language_interface."/exercice.inc.php");

	include_once (api_get_path(LIBRARY_PATH).'text.lib.php');
	include_once ("../resourcelinker/resourcelinker.inc.php");
	include_once (api_get_path(LIBRARY_PATH)."events.lib.inc.php");

	$LPname = display_addedresource_link_in_learnpath($item_type, $item_id, '', $id, 'builder', 'nolink');

	$expcontent = "<!-- 
		This is an exported file from Dokeos Learning Path belonging to a Scorm compliant content package.
		Do not modify or replace individually.
			
		Export module author : Denes Nagy <darkden@evk.bke.hu>
	
		-->
			
		";
	//files needed for communicating with the scos
	$scocomfiles = "<script type='text/javascript' src='../js/APIWrapper.js'></script>"."<script type='text/javascript' src='../js/SCOFunctions.js'></script>";
	$expcontent .= '<html><head><link rel="stylesheet" href="../css/default.css" type="text/css" media="screen,projection" />'.$scocomfiles.'</head><body>';

	$donebutton .= "<script type='text/javascript'>
			/* <![CDATA[ */
			loadPage();
			var   studentName = '!';
			var   lmsStudentName = doLMSGetValue(  'cmi.core.student_name' );
			if ( lmsStudentName  != '' )
			{
			   studentName = ' ' + lmsStudentName +   '!';
			}
			/* ]]> */
			</script>
			<br /><br />
			<form><input type=\"hidden\" name=\"SQMSESSID\" value=\"36812c2dea7d8d6e708d5e6a2f09b0b9\" />
				<table cols='3'	width='100%' align='center'>
					<tr>
					<td	align='middle'><input type = 'button' value	= '  ".$langDone."  ' onclick = \"doQuit('completed')\" id='button2' name='button2'></td>
					</tr>
				</table>
			</form>";

	/** 
	 * switch between the different element types, namely:
	 * - Agenda
	 * - Ad_Valvas
	 * - Course_description
	 * - Document
	 * - Introduction_text
	 * - HotPotatoes
	 * - Exercise
	 * - Post
	 * - Forum						]
	 * - Thread					]
	 * - Dropbox				]
	 * - Assignments	]  Theses elements are all replaced by a simple message in the exported document
	 * - Groups					]
	 * - Users						]
	 * - Link _self  
	 * - Link _blank
	 */
	switch ($item_type)
	{

		//------------------------AGENDA BEGIN-------------------
		case "Agenda" :
			//1 Get agenda event data from the database table
			$TABLEAGENDA = Database :: get_course_table(TABLE_AGENDA);
			$sql = "SELECT * FROM ".$TABLEAGENDA." where (id=$item_id)";
			$result = api_sql_query($sql, __FILE__, __LINE__);

			//2 Prepare table output
			$expcontent .= "<table id=\"agenda_list\" >";
			$barreMois = "";

			//3 For each event corresponding to this agenda, do the following:
			while ($myrow = mysql_fetch_array($result))
			{
				//3.1 Make the blue month bar appear only once.
				if ($barreMois != date("m", strtotime($myrow["start_date"])))
				{
					//3.1.1 Update the check value for the month bar
					$barreMois = date("m", strtotime($myrow["start_date"]));
					//3.1.2	Display the month bar
					$expcontent .= "<tr><td id=\"title\" colspan=\"2\" class=\"month\" valign=\"top\">".ucfirst(format_locale_date("%B %Y", strtotime($myrow["start_date"])))."</td></tr>";
				}

				//3.2 Display the agenda items (of this month): the date, hour and title
				$db_date = (int) date(d, strtotime($myrow["start_date"]));
				if ($_GET["day"] <> $db_date)
				{ //3.2.1.a If the day given in the URL (might not be set) is different from this element's day, use style 'data'
					$expcontent .= "<tr><td class=\"data\" colspan='2'>";
				}
				else
				{ //3.2.1.b Else (same day) use style 'datanow'
					$expcontent .= "<tr><td class=\"datanow\" colspan='2'>";
				}
				//3.2.2 Mark an anchor for this date
				$expcontent .= "<a name=\"".(int) date(d, strtotime($myrow["start_date"]))."\"></a>"; // anchoring
				//3.2.3 Write the date and time of this event to the export string
				$expcontent .= ucfirst(format_locale_date($dateFormatLong, strtotime($myrow["start_date"])))."&nbsp;&nbsp;&nbsp;";
				$expcontent .= ucfirst(strftime($timeNoSecFormat, strtotime($myrow["start_time"])))."";
				//3.2.4 If a duration is set, write it, otherwise ignore
				if ($myrow["duration"] == "")
				{
					$expcontent .= "<br />";
				}
				else
				{
					$expcontent .= " / ".$lang_lasting." ".$myrow["duration"]."<br/>";
				}
				//3.2.5 Write the title
				$expcontent .= $myrow["title"];
				$expcontent .= "</td></tr>";
				//3.2.6 Prepare the content of the agenda item
				$content = $myrow["content"];
				//3.2.7 Make clickable???
				$content = make_clickable($content);
				$content = api_parse_tex($content);
				//3.2.8 Write the prepared content to the export string
				$expcontent .= "<tr><td class=\"text\" colspan='2'>";
				$expcontent .= $content;
				$expcontent .= "</td></tr>";

				// displaying the agenda item of this month: the added resources
				//     this part is not included into LP export
				/*if (check_added_resources("Agenda", $myrow["id"]))
				{
				$content.= "<tr><td colspan='2'>";
				$content.= "<i>".get_lang('AddedResources')."</i><br/>";
				display_added_resources("Agenda", $myrow["id"]);
				$content.= "</td></tr>";
				}*/

			}
			//4 Finish the export string
			$expcontent .= "<tr></table>";

			break;
			//------------------------ANNOUNCEMENT BEGIN-------------------
		case "Ad_Valvas" :
			//1 Get the announcement data from the database
			$tbl_announcement = Database::get_course_table(TABLE_ANNOUNCEMENT);
			$sql = "SELECT * FROM $tbl_announcement where id='$item_id'";
			$result = api_sql_query($sql, __FILE__, __LINE__);

			//2 Initialise export string
			$expcontent .= "<table class=\"data_table\">";

			//3 For each announcement matching the query
			while ($myrow = mysql_fetch_array($result))
			{
				//3.1 Get the __ field data
				$content = $myrow[1];
				//$content = nl2br($content);
				//3.2 Prepare the data for export
				$content = make_clickable($content);
				$content = api_parse_tex($content);

				//3.3 Get a UNIX(?<-mktime) Timestamp of the end_date for this announcement
				$last_post_datetime = $myrow['end_date']; // post time format  datetime de mysql
				list ($last_post_date, $last_post_time) = split(" ", $last_post_datetime);
				list ($year, $month, $day) = explode("-", $last_post_date);
				list ($hour, $min) = explode(":", $last_post_time);
				$announceDate = mktime($hour, $min, 0, $month, $day, $year);

				//3.4 Compare the end date to the last login date of the user (mark it in red if he has not already read it)
				if ($announceDate > $_SESSION['user_last_login_datetime'])
				{
					$colorBecauseNew = " color=\"red\" ";
				}
				else
				{
					$colorBecauseNew = "  ";
				}

				//3.5 Write this content to the export string (formatted HTML array)
				$expcontent .= "<tr>\n"."<td class=\"cell_header\">\n"."<font ".$colorBecauseNew.">".$langPubl." : ".ucfirst(format_locale_date($dateFormatLong, strtotime($last_post_date)))."</font>\n"."</td>\n"."</tr>\n"."<tr>\n"."<td>\n".$content."</td>\n"."</tr>\n";

			} // while loop

			//4 Finish the export string
			$expcontent .= "</table>";

			break;
			//------------------------Course_description BEGIN-------------------
		case "Course_description" :
			//1 Get course description data from database
			$tbl_course_description = Database :: get_course_table(TABLE_COURSE_DESCRIPTION);
			$result = api_sql_query("SELECT id, title, content FROM ".$tbl_course_description." ORDER BY id", __FILE__, __LINE__);

			//2 Check this element
			if (mysql_num_rows($result))
			{
				//2.a This course has one (or more) description in the database
				$expcontent .= "<hr noshade=\"noshade\" size=\"1\" />";
				//2.a.1 For each description available for this course
				while ($row = mysql_fetch_array($result))
				{
					//2.a.1.1 Write title to export string
					$expcontent .= "<h4>".$row['title']."</h4>";
					//2.a.1.2 Prepare content
					$content = make_clickable(nl2br($row['content']));
					$content = api_parse_tex($content);
					//2.a.1.3 Write content to the export string
					$expcontent .= $content;
				}
			}
			else
			{
				//2.b This course has no description available
				$expcontent .= "<br /><h4>$langThisCourseDescriptionIsEmpty</h4>";
			}

			break;
			//------------------------DOCUMENT BEGIN-------------------
		case "Document" :
			//1 Get the document data from the database
			$tbl_document = Database::get_course_table(TABLE_DOCUMENT);
			$sql_query = "SELECT * FROM $tbl_document WHERE id=$item_id";
			$sql_result = api_sql_query($sql_query, __FILE__, __LINE__);
			$myrow = mysql_fetch_array($sql_result);
			//2 Get the origin path of the document to treat it internally
			$orig = api_get_path(SYS_COURSE_PATH).$_course['path'].'/document'.$myrow["path"];
			//3 Make some kind of strange transformation to get the destination filepath ???
			$pathname = explode("/", $myrow["path"]);
			$last = count($pathname) - 1;
			$filename = 'data/'.$filename.$pathname[$last];
			$copyneeded = true;

			//htm files do not need to be copied as the ok button is inserted into them, 
			//so don't copy directly
			$extension = explode(".", $pathname[$last]);
			//This old condition was WRONG for names like design.html.old. Instead, we now get the extension 
			// by using preg_match to match case-insensitive (probably faster than 4 conditions)
			//if (($extension[1]=='htm') or ($extension[1]=='html') or ($extension[1]=='HTM') or ($extension[1]=='HTML')) {
			//4 Check the file extension
			if (preg_match('/.*(\.htm(l)?)$/i', $pathname[$last]))
			{
				//4.a If this file ends with ".htm(l)", we consider it's an HTML file
				//src tag check begin
				//we now check if there is any src attribute in htm(l) files, if yes, we have to also export
				//the target file (swf, mp3, video,...) of that src tag
				//In case of absolute links (http://) this is not neccessary, but makes no error.
				//however still missing : relative links case with subdirs -> the necessary dirs are not created in the exported package

				//4.a.1 Get the file contents into $file
				$file = file_get_contents($orig);

				//4.a.2 Get all the src links in this file
				//preg_match_all("|((?i)src=\".*\" )|U",$file,$match);				
				$match = GetSRCTags($orig);

				//4.a.3 For each src tag found, do the following:
				for ($i = 0; $i < count($match); $i ++)
				{
					//4.a.3.1 Get the tag (split from the key)
					list ($key, $srctag) = each($match);
					$src = $srctag;

					//4.a.3.2 Check the link kind (web or absolute/relative)
					if (stristr($src, "http") === false)
					{
						//4.a.3.2.a Do something only if relative (otherwise the user will be able to see it too anyway)
						//4.a.3.2.a.1 Get a proper URL and remove all './'
						$src = urldecode($src); //mp3
						//$src=str_replace('./','',$src);
						$src = preg_replace('/^\.\//', '', $src);
						//4.a.3.2.a.2 Remove the player link from the URL (only use the mp3 file)
						$src = str_replace('mp3player.swf?son=', '', $src); //mp3
						//4.a.3.2.a.3 Remove funny link parts
						$src = str_replace('?0', '', $src); //mp3
						//the previous lines are used when creating docs with Dokeos Document tool's htmlarea
						//rows marked by 'mp3' are needed because the mp3 plugin inserts the swf-mp3 links in a very strange way
						//and we can decode them with those 3 lines, hoping this will not cause errors in case of other htmls,
						//created by any other software												
						//4.a.3.2.a.4 Prepare source and destination paths
						$source = api_get_path(SYS_COURSE_PATH).$_course['path'].'/document'.dirname($myrow['path']).'/'.$src;
						$dest = $expdir.'/data/'.$src;
						//CopyNCreate($source,$dest);
						rcopy($source, $dest);
					} //else...?
				}

				//src tag check end

				//sco communication insertion begin
				//4.a.4 If we want to add SCORM actions and a "Done" button, do the following:
				if ($add_scorm_communications === true)
				{
					if ($bodyclose = strpos($file, '</body>'))
					{
						$file = substr_replace($file, $scocomfiles.$donebutton, $bodyclose, 7);
					}
					elseif ($htmlclose = strpos($file, '</html>'))
					{
						$file = substr_replace($file, $scocomfiles.$donebutton, $htmlclose, 7);
						$file .= '</html>';
					}
					else
					{
						$file .= $scocomfiles.$donebutton;
					}
				} //sco communication insertion end	

				//4.a.5 Replace the file's name by adding the element's ID before htm
				// This will not work with uppercase HTML though. Maybe use the preg_replace syntax proposed...
				$filename = str_replace('.htm', $id.'.htm', $filename);
				//$filename=preg_replace('/.*(\.htm(l)?)$/i',$id.$1,$filename);
				//4.a.6 Export these contents to a file and set the circle1_files array for later reuse
				exporttofile($filename, $LPname, $id, $file);

				//The file has been copied, so ask not to copy it again
				$copyneeded = false;

			} //if (htm(l) files) end

			//5 If we still need to copy the file (e.g. it was not an HTML file), then copy and set circle1_files for later reuse
			if ($copyneeded)
			{
				copy($orig, $expdir.'/'.$filename);
				$circle1_files[0][] = $filename;
				$circle1_files[1][] = $LPname;
				$circle1_files[2][] = $id;
			}

			//echo $orig;
			return;

			//------------------------Introduction_text BEGIN-------------------
		case "Introduction_text" :
			//1 Get the introduction text data from the database
			$TBL_INTRO = Database :: get_course_tool_intro_table();
			$result = api_sql_query("SELECT * FROM ".$TBL_INTRO." WHERE id=1");
			$myrow = mysql_fetch_array($result);
			$intro = $myrow["intro_text"];
			//2 Write introduction text to the export string
			$expcontent .= "<br />".$intro;
			break;

			//------------------------HotPotatoes BEGIN-------------------
		case "HotPotatoes" :
			//1 Get HotPotatoes data from the document table
			$tbl_document = Database::get_course_table(TABLE_DOCUMENT);
			$result = api_sql_query("SELECT * FROM $tbl_document WHERE id=$item_id", __FILE__, __LINE__);
			$myrow = mysql_fetch_array($result);
			//2 Get the document path
			$testfile = api_get_path(SYS_COURSE_PATH).$_course['path']."/document".urldecode($myrow['path']);
			//3 Get the document contents into a string
			$content = file_get_contents($testfile);
			//4 Get the document filename (just the file, no path) - would probably be better to use PHP native function
			$pathname = explode("/", $myrow["path"]);
			$last = count($pathname) - 1;
			$filename = 'data/'.$filename.$pathname[$last];

			//4beta - get all linked files and copy them (procedure copied from documents type)
			//Get all the src links in this file
			$match = GetSRCTags($testfile);
			//For each src tag found, do the following:
			foreach ($match as $src)
			{
				//Check the link kind (web or absolute/relative)
				if (stristr($src, "http") === false)
				{
					//Do something only if relative (otherwise the user will be able to see it too anyway)
					//Get a proper URL and remove all './'
					$src = urldecode($src); //mp3
					$src = str_replace('./', '', $src);
					//Remove the player link from the URL (only use the mp3 file)
					$src = str_replace('mp3player.swf?son=', '', $src); //mp3
					//Remove funny link parts
					$src = str_replace('?0', '', $src); //mp3
					//The previous lines are used when creating docs with Dokeos Document tool's htmlarea
					//rows marked by 'mp3' are needed because the mp3 plugin inserts the swf-mp3 links in a very strange way
					//and we can decode them with those 3 lines, hoping this will not cause errors in case of other htmls,
					//created by any other software												
					//Prepare source and destination paths
					$source = api_get_path(SYS_COURSE_PATH).$_course['path'].'/document'.dirname($myrow['path']).'/'.$src;
					$dest = $expdir.'/data/'.$src;
					//CopyNCreate($source,$dest);
					rcopy($source, $dest);
				} //else...?
			}

			//5 Prepare the special "close window" for this test
			$closewindow = "<html><head><link rel='stylesheet' type='text/css' href='../css/default.css'></head><body>"."<br /><div class='message'>$langHotPotatoesFinished</div></body></html>";

			//Finish is the function of HP to save scores, we insert our scorm function calls to its beginning
			//'Score' is the variable that tracks the score in HP tests
			//6
			$mit = "function Finish(){";

			$js_content = "var SaveScoreVariable = 0; // This variable is included by Dokeos LP export\n"."function mySaveScore() // This function is included by Dokeos LP export\n"."{\n"."   if (SaveScoreVariable==0)\n"."		{\n"."	   SaveScoreVariable = 1;\n".
				//the following function are implemented in SCOFunctions.js
	"      exitPageStatus = true;\n"."      computeTime();\n"."      doLMSSetValue( 'cmi.core.score.raw', Score );\n"."      doLMSSetValue( 'cmi.core.lesson_status', 'completed' );\n"."      doLMSCommit();\n"."      doLMSFinish();\n".
				//				"      document.write('".$closewindow."');\n".
		//if you insert the previous row, the test does not appear correctly !!!!
	"		}\n"."}\n"."function Finish(){\n"." mySaveScore();";

			$start = "<script type='text/javascript'> loadPage(); </script>";
			//7 Replace the current MIT function call by our set of functions. In clear, transform HP to SCORM
			$content = str_replace($mit, $js_content, $content);
			//8 Finally, add the API loading calls (although that might have been done first)
			$content = str_replace("</script>", "</script>".$scocomfiles.$start, $content);

			//9 Change the filename to add the database ID and export to a new file, 
			//  setting the circle1_files array for later reuse
			$filename = str_replace('.htm', $id.'.htm', $filename);
			exporttofile($filename, $LPname, $id, $content);

			return;

			//------------------------Dokeos test BEGIN-------------------
		case "Exercise" :
			//1 Use the export_exercise() function to do the job of constructing the question's HTML table
			$expcontent .= export_exercise($item_id);
			break;
			//------------------------POST BEGIN---------------------------------------
		case "Post" :
			//1 Get the forum post data from the database
			$tbl_posts =Database::get_course_table(TABLE_FORUM_POST);
			$tbl_posts_text =Database::get_course_table(TOOL_FORUM_POST_TEXT_TABLE);
			$result = api_sql_query("SELECT * FROM $tbl_posts where post_id=$item_id", __FILE__, __LINE__);
			$myrow = mysql_fetch_array($result);
			// grabbing the title of the post
			$sql_titel = "SELECT * FROM $tbl_posts_text WHERE post_id=".$myrow["post_id"];
			$result_titel = api_sql_query($sql_titel, __FILE__, __LINE__);
			$myrow_titel = mysql_fetch_array($result_titel);

			$posternom = $myrow['nom'];
			$posterprenom = $myrow['prenom'];
			$posttime = $myrow['post_time'];
			$posttext = $myrow_titel['post_text'];
			$posttitle = $myrow_titel['post_title'];
			$posttext = str_replace('"', "'", $posttext);

			//2 Export contents as an HTML table
			$expcontent .= "<table border='0' cellpadding='3' cellspacing='1' width='100%'>
							<tr>
								<td colspan='2' bgcolor='#e6e6e6'><b>$posttitle</b><br />$posttext</td>
							</tr>
							<tr>
								<td colspan='2'></td>
							</tr>
							<tr>
								<td bgcolor='#cccccc' align='left'>$lang_author : $posterprenom $posternom</td>
								<td align='right' bgcolor='#cccccc'>$lang_date : $posttime</td>
							</tr>
							<tr><td colspan='2' height='10'></td></tr>
						</table>";
			break;
			//------------------------NOT IMPLEMENTED ITEMS BEGIN-------------------
		case "Forum" :
		case "Thread" :
		case "Dropbox" :
		case "Assignments" :
		case "Groups" :
		case "Users" :
			//1 Instead of building something, put an info message
			$langItemMissing1 = "There was a ";
			$langItemMissing2 = "page (step) here in the original Dokeos Learning Path.";
			$expcontent .= "<div class='message'>$langItemMissing1 $item_type $langItemMissing2</div>";
			break;
			//------------------------Link BEGIN-------------------------------------
		case "Link _self" :
		case "Link _blank" :
			//1 Get the link data from the database
			$TABLETOOLLINK = Database :: get_course_link_table();
			$result = api_sql_query("SELECT * FROM $TABLETOOLLINK WHERE id=$item_id", __FILE__, __LINE__);
			$myrow = mysql_fetch_array($result);
			$thelink = $myrow["url"];
			//2 Check the link type (open in blank page or in current page)
			if ($item_type == "Link _blank")
			{
				$target = "_blank";
			}
			//3 Write the link to the export string
			$expcontent .= "<a href='$thelink?SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9' target='".$target."'>$LPname</a>";
			//4 Change the element type for later changes (this is lost, however, so useless here)
			$item_type = "Link"; //to put this to the filename
			//$LPname="<a href='$thelink?SQMSESSID=36812c2dea7d8d6e708d5e6a2f09b0b9' target=".$target.">$LPname</a>";
			//i am still not sure about Link export : to export them as files or they can appear in the TOC at once ?
			//to enable the second possibility, unrem the row $LPname=...
			break;
	}

	//now we add the Done button and the initialize function : loadpage()
	//not in the case of Documents, HotP
	if ($item_type != 'Exercise' and ($add_scorm_communications === true))
	{
		$expcontent .= $donebutton;
	}
	//End the export string with valid HTML tags
	$expcontent .= "</body></html>";

	//Prepare new file name
	$filename = $item_type.$id.".htm";
	//Write the export content to the new file
	exporttofile('data/'.$filename, $LPname, $id, $expcontent);

}

/**
 * This function exports the given item's description into a separate file
 * @param	integer	Item id
 * @param	string	Item type
 * @param	string	Description
 * @return void
 */
function exportdescription($id, $item_type, $description)
{

	global $expdir;

	$filename = $item_type.$id.".desc";
	$expcontent = $description;
	exporttofile($expdir.$filename, 'description_of_'.$item_type.$id, 'description_of_item_'.$id, $expcontent);
}

/**
 * This function deletes an entire directory
 * @param	string	The directory path
 * @return boolean	True on success, false on failure
 */
function deldir($dir)
{
	$dh = opendir($dir);
	while ($file = readdir($dh))
	{
		if ($file != "." && $file != "..")
		{
			$fullpath = $dir."/".$file;
			if (!is_dir($fullpath))
			{
				unlink($fullpath);
			}
			else
			{
				deldir($fullpath);
			}
		}
	}

	closedir($dh);

	if (rmdir($dir))
	{
		return true;
	}
	else
	{
		return false;
	}
}

/**
 * This functions exports the given path. This is the opener function, which is called first
 * @param	integer 	The path id
 * @return	resource	A zip file, containing a hopefully Scorm compliant course made from the LP. This might happen when we don't actually exit the function first :-)
 */
function exportpath($learnpath_id)
{
	//1 Initialise variables
	global $_course, $circle1_files, $LPnamesafe, $LPname, $expdir;
	//$tbl_learnpath_main, $tbl_learnpath_chapter, $tbl_learnpath_item, 
	$tbl_learnpath_main = Database :: get_course_table(TABLE_LEARNPATH_MAIN);
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);

	//where applicable, add a scorm "Done" button at the end of all contents
	$add_scorm_button = true;

	//2 Get the name of the LP
	include_once (api_get_path(LIBRARY_PATH)."fileUpload.lib.php");
	$sql = "SELECT * FROM $tbl_learnpath_main WHERE (lp_id=$learnpath_id)";
	$result = api_sql_query($sql, __FILE__, __LINE__);
	$row = mysql_fetch_array($result);
	$LPname = $row['learnpath_name'];
	$LPnamesafe = replace_dangerous_char($LPname, 'strict');

	//3 Get a temporary dir for creating the zip file	
	$expdir = api_get_path('SYS_COURSE_PATH').$_course['path']."/temp/".$LPnamesafe;
	$fromdir = '../scorm/export/'; //this dir contains some standard files

	deldir($expdir); //make sure the temp dir is cleared
	mkdir($expdir);
	mkdir($expdir.'/css');
	mkdir($expdir.'/data');
	mkdir($expdir.'/js');
	mkdir($expdir.'/data/images');
	mkdir($expdir.'/data/audio');
	mkdir($expdir.'/data/videos');

		$circle1 = array (//this array contains the types of elements we want to export
	'Chapter', 'Agenda', 'Ad_Valvas', 'Course_description', 'Document', 'Introduction_text', 'Link _self', 'Link _blank', 'Forum', 'Thread', 'Post', 'Exercise', 'HotPotatoes', 'Assignments', 'Dropbox', 'Users', 'Groups');
	//$circle2=array('');

	//4 Get the first level chapters - YW added parent_item_id condition for multi-level paths
	$sql = "SELECT * FROM $tbl_learnpath_chapter 
			WHERE (lp_id=$learnpath_id and parent_item_id=0) 
			ORDER BY display_order ASC";
	//to get all the elements, we should use the function that builds the table of content get_learnpath_tree
	//WHERE (lp_id=$learnpath_id) 
	//ORDER BY parent_item_id, display_order ASC";
	$result = api_sql_query($sql, __FILE__, __LINE__);

	//5 export the items listed in Circle I one by one
	while ($row = mysql_fetch_array($result))
	{
		//5.1 Get items data from the database for this chapter
		$parent_item_id = $row['id'];
		//$sql2a="SELECT * FROM $tbl_learnpath_chapter WHERE (lp_id=$learnpath_id and parent_item_id=$parent_item_id) ORDER BY display_order ASC";
		//$result2a=api_sql_query($sql,__FILE__,__LINE__); 		
		$sql2b = "SELECT * FROM $tbl_learnpath_item WHERE (parent_item_id=$parent_item_id) ORDER BY display_order ASC";
		$result2b = api_sql_query($sql2b, __FILE__, __LINE__);

		while ($row2 = mysql_fetch_array($result2b))
		{
			//5.1.1 Check if the element is in the circle1 array
			$tobeexported = false;
			for ($i = 0; $i < count($circle1) && !$tobeexported; $i ++)
			{
				//if the type is found in the circle1 array, ask for export
				if ($circle1[$i] == $row2['item_type'])
				{
					$tobeexported = true;
				}
			}
			//5.1.2 If applicable, export the item to an HTML file (see exportitem function for more details)
			if ($tobeexported)
			{
				exportitem($row2['id'], $row2['item_id'], $row2['item_type'], $add_scorm_button);
				/*if ($row2['description']) {   //put the description of items to a separate file (.desc)
					exportdescription($row2['id'],$row2['item_type'],$row2['description']);
				}*/
			}
		} //end of items loop
	} //end of first-level chapters loop

	//6 export the other necceassary files
	$filename = 'default.css';
	copy('../css/'.$filename, $expdir.'/css/'.$filename);
	$filename = 'ims_xml.xsd';
	copy($fromdir.$filename, $expdir.'/'.$filename);
	$filename = 'imscp_v1p1.xsd';
	copy($fromdir.$filename, $expdir.'/'.$filename);
	$filename = 'imsmd_v1p2.xsd';
	copy($fromdir.$filename, $expdir.'/'.$filename);
	$filename = 'APIWrapper.js';
	copy($fromdir.$filename, $expdir.'/js/'.$filename);
	$filename = 'SCOFunctions.js';
	copy($fromdir.$filename, $expdir.'/js/'.$filename);

	//in case circle1_files is not defined, build it
	//$circle1_files
	//7 create imsmanifest.xml
	createimsmanifest($circle1_files, $learnpath_id);

	//8 put the files in the exportdir into a zip and force download
	include_once (api_get_path(LIBRARY_PATH)."pclzip/pclzip.lib.php");
	//create zipfile of given directory
	$zip_folder = new PclZip(api_get_path('SYS_COURSE_PATH').$_course['path']."/temp/".$LPnamesafe.".zip");

	$zip_folder->create(api_get_path('SYS_COURSE_PATH').$_course['path']."/temp/".$LPnamesafe."/", PCLZIP_OPT_REMOVE_PATH, api_get_path('SYS_COURSE_PATH').$_course['path']."/temp/");
	//api_get_path('SYS_COURSE_PATH').$_course['path']."/temp/".$LPnamesafe); // whitout folder

	// modified by imandak80

	/*	copy(api_get_path('SYS_COURSE_PATH').$_course['path']."/temp/".$LPnamesafe.".zip",
			 api_get_path('SYS_COURSE_PATH').$_course['path']."/document/".$LPnamesafe.".zip");
	*/

	$zipfoldername = api_get_path('SYS_COURSE_PATH').$_course['path']."/temp/".$LPnamesafe;
	$zipfilename = $zipfoldername.".zip";
	DocumentManager :: file_send_for_download($zipfilename, false, basename($LPnamesafe.".zip"));

	//9 Delete the temporary zip file and directory
	include_once (api_get_path(LIBRARY_PATH)."fileManage.lib.php");
	// in fileManage.lib.php
	my_delete($zipfilename);
	my_delete($zipfoldername);

	//exit;

	//0 Return the circle_files hash (array)
	return ($circle1_files); //has been used before...
}

/**
 * Export SCORM content into a zip file
 *
 * Basically, all this function does is put the scorm directory back into a zip file (like the one
 * that was most probably used to import the course at first) 
 * @param	string	Name of the SCORM path (or the directory under which it resides)
 * @param	array		Not used right now. Should replace the use of global $_course
 * @return	void 
 * @author	imandak80 
 */
function exportSCORM($scormname, $course)
{
	global $_course;

	//initialize
	$tmpname = api_get_path('SYS_COURSE_PATH').$_course['path']."/scorm";
	$zipfoldername = $tmpname.$scormname;
	$zipfilename = $zipfoldername.".zip";

	//create zipfile of given directory
	include_once (api_get_path(LIBRARY_PATH)."pclzip/pclzip.lib.php");
	$zip_folder = new PclZip($zipfilename);
	$list = 1;
	//$list = $zip_folder->create($zipfoldername."/",PCLZIP_OPT_REMOVE_PATH,$tmpname.$scormname."/"); // whitout folder
	$list = $zip_folder->create($zipfoldername."/", PCLZIP_OPT_REMOVE_PATH, $tmpname);
	if ($list == 0)
	{
		//  echo "Error  : ".$zip_folder->errorInfo(true);
	}

	//send to client	
	DocumentManager :: file_send_for_download($zipfilename, false, basename($scormname.".zip"));

	//clear
	include_once (api_get_path(LIBRARY_PATH)."fileManage.lib.php");
	my_delete($zipfilename);
}

/**
 * This function returns an xml tag
 * $data behaves as the content in case of full tags 
 * $data is an array of attributes in case of returning an opening tag
 * @param	string
 * @param	string
 * @param	array
 * @param	string
 * @return string
 */
function xmltagwrite($tagname, $which, $data, $linebreak = "yes")
{
	switch ($which)
	{
		case "open" :
			$tag = "<".$tagname;
			$i = 0;
			while ($data[0][$i])
			{
				$tag .= " ".$data[0][$i]."=\"".$data[1][$i]."\"";
				$i ++;
			}
			if ($tagname == 'file')
			{
				$closing = '/';
			}
			$tag .= $closing.">";
			if ($linebreak != 'no_linebreak')
			{
				$tag .= "\n";
			}
			break;
		case "close" :
			$tag = "</".$tagname.">";
			if ($linebreak != 'no_linebreak')
			{
				$tag .= "\n";
			}
			break;
		case "full" :
			$tag = "<".$tagname;
			$tag .= ">".$data."</".$tagname.">";
			if ($linebreak != 'no_linebreak')
			{
				$tag .= "\n";
			}
			break;
	}
	return $tag;
}

/**
 * This function writes the imsmanifest.xml and exports the chapter names
 * @param	array		Array containing filenames
 * @param	integer	Learnpath_id
 * @return	void 
 */
function createimsmanifest($circle1_files, $learnpath_id)
{
	global $_course, $LPname, $expdir, $LPnamesafe;
	//$tbl_learnpath_main, $tbl_learnpath_chapter, $tbl_learnpath_item, 
	$tbl_learnpath_main = Database :: get_course_table(TABLE_LEARNPATH_MAIN);
	$tbl_learnpath_item = Database :: get_course_table(TABLE_LEARNPATH_ITEM);
	$tbl_learnpath_chapter = Database :: get_course_table(TABLE_LEARNPATH_CHAPTER);

	include_once ('../metadata/md_funcs.php'); // RH: export metadata

	//1.1 header
	/*
		$header='<?xml version="1.0" encoding="UTF-8"?><manifest identifier="'.$LPnamesafe.'" xmlns="http://www.imsglobal.org/xsd/imscp_v1p1" xmlns:imsmd="http://www.imsglobal.org/xsd/imsmd_v1p2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imscp_v1p1 imscp_v1p1.xsd http://www.imsglobal.org/xsd/imsmd_v1p2 imsmd_v1p2.xsd" version="IMS CP 1.1.3">'."\n";
	*/

	//1.2
	//charset should be dependent on content
	$mycharset = 'ISO-8859-1';
	$header = '<?xml version="1.0" encoding="'.$mycharset.'"?>'."\n<manifest identifier='".$LPnamesafe."' version='1.1'\n xmlns='http://www.imsproject.org/xsd/imscp_rootv1p1p2'\n xmlns:adlcp='http://www.adlnet.org/xsd/adlcp_rootv1p2'\n xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'\n xsi:schemaLocation='http://www.imsproject.org/xsd/imscp_rootv1p1p2 imscp_rootv1p1p2.xsd\n http://www.imsglobal.org/xsd/imsmd_rootv1p2p1 imsmd_rootv1p2p1.xsd\n http://www.adlnet.org/xsd/adlcp_rootv1p2 adlcp_rootv1p2.xsd'>\n";

	$org .= xmltagwrite('metadata', 'open');
	$org .= "  ".xmltagwrite('schema', 'full', 'ADL SCORM');
	$org .= "  ".xmltagwrite('schemaversion', 'full', '1.2');
	$org .= xmltagwrite('metadata', 'close');

	$defaultorgname = 'default_org';

	$attributes[0][0] = 'default';
	$attributes[1][0] = $defaultorgname;
	$org .= xmltagwrite('organizations', 'open', $attributes);

	$attributes[0][0] = 'identifier';
	$attributes[1][0] = $defaultorgname;
	$org .= "  ".xmltagwrite('organization', 'open', $attributes);

	$org .= "    ".xmltagwrite('title', 'full', $LPname);

	//items list
	$i = 0;
	$previous_item_id = '00';
	while ($circle1_files[0][$i])
	{
		//check whether we are in the border of two chapters
		//if (!$desc=strpos($circle1_files[2][$i],'scription')) {  //this is is needed if the descriptions are exported to file

		$sql = "SELECT * FROM $tbl_learnpath_item WHERE (id=".$circle1_files[2][$i].")";
		$result = api_sql_query($sql, __FILE__, __LINE__);
		$row = mysql_fetch_array($result);
		$parent_item_id = $row['parent_item_id'];

		if ($parent_item_id != $previous_item_id)
		{
			//we create the item tag for the chapter (without indifierref)
			$sql2 = "SELECT * FROM $tbl_learnpath_chapter WHERE (id=".$parent_item_id.")";
			$result2 = api_sql_query($sql2, __FILE__, __LINE__);
			$row2 = mysql_fetch_array($result2);
			$chapter_name = $row2['chapter_name'];

			$attributes = '';
			$attributes[0][] = 'identifier';
			$attributes[1][] = 'chapter_'.$row2['id'];
			$attributes[0][] = 'isvisible';
			$attributes[1][] = '1';
			if ($previous_item_id != '00')
			{
				$org .= "    ".xmltagwrite('item', 'close');
			}

			$org .= "    ".xmltagwrite('item', 'open', $attributes);
			$org .= "      ".xmltagwrite('title', 'full', $chapter_name);

			if ($row2['chapter_description'] != '')
			{
				//chapter description
				$attributes = '';
				$attributes[0][] = 'identifier';
				$attributes[1][] = 'chapter_'.$row2['id'].'_desc';
				$attributes[0][] = 'isvisible';
				$attributes[1][] = '1';
				$org .= "    ".xmltagwrite('item', 'open', $attributes);
				$org .= "      ".xmltagwrite('title', 'full', ' '.$row2['chapter_description']);
				$org .= "    ".xmltagwrite('item', 'close');
			}
		}
		$previous_item_id = $parent_item_id;
		//}

		$attributes = ''; //item output
		$attributes[0][] = 'identifier';
		$attributes[1][] = 'item_'.$circle1_files[2][$i];
		$attributes[0][] = 'identifierref';
		$attributes[1][] = 'item_ref_'.$circle1_files[2][$i];
		$attributes[0][] = 'isvisible';
		$attributes[1][] = '1';
		$org .= "    ".xmltagwrite('item', 'open', $attributes);
		$org .= "      ".xmltagwrite('title', 'full', $circle1_files[1][$i]);

		if ($row['prereq_id'] != '')
		{ //item prerequisites
			$attributes = '';
			$attributes[0][] = 'type';
			$attributes[1][] = 'aicc_script';
			$org .= "      ".xmltagwrite('adlcp:prerequisites', 'open', $attributes, "no_linebreak");
			if ($row['prereq_type'] == 'i')
			{
				$org .= 'item_'.$row['prereq_id'];
			}
			if ($row['prereq_type'] == 'c')
			{
				$org .= 'chapter_'.$row['prereq_id'];
			}
			$org .= xmltagwrite('adlcp:prerequisites', 'close', $attributes);
		}

		if ($row['description'] != '')
		{
			//item description
			$attributes = '';
			$attributes[0][] = 'identifier';
			$attributes[1][] = 'item_'.$circle1_files[2][$i].'_desc';
			$attributes[0][] = 'isvisible';
			$attributes[1][] = '1';
			$org .= "    ".xmltagwrite('item', 'open', $attributes);
			$org .= "      ".xmltagwrite('title', 'full', ' '.$row['description']);
			$org .= "    ".xmltagwrite('item', 'close');
		}

		$mds = new mdstore(TRUE); // RH: export metadata; if no table, create it
		if (($mdt = $mds->mds_get($row['item_type'].'.'.$row['item_id'])))
			if (($mdo = strpos($mdt, '<metadata>')) && ($mdc = strpos($mdt, '</metadata>')))
				$org .= "    ".substr($mdt, $mdo, $mdc - $mdo +11)."\n";

		$org .= "    ".xmltagwrite('item', 'close');
		$i ++;
	}

	if ($circle1_files)
	{
		$org .= "    ".xmltagwrite('item', 'close');
	} //not needed in case of a blank path
	$org .= "  ".xmltagwrite('organization', 'close');
	$org .= xmltagwrite('organizations', 'close');
	$org .= xmltagwrite('resources', 'open');

	//resources list
	$i = 0;
	while ($circle1_files[0][$i])
	{
		$attributes = '';
		$attributes[0][] = 'identifier';
		$attributes[1][] = 'item_ref_'.$circle1_files[2][$i];
		$attributes[0][] = 'type';
		$attributes[1][] = 'webcontent';
		$attributes[0][] = 'adlcp:scormtype';
		$attributes[1][] = 'sco';
		$attributes[0][] = 'href';
		$attributes[1][] = $circle1_files[0][$i];
		$org .= "  ".xmltagwrite('resource', 'open', $attributes);

		$org .= "    ".xmltagwrite('metadata', 'open');
		$org .= "      ".xmltagwrite('schema', 'full', 'ADL SCORM');
		$org .= "      ".xmltagwrite('schemaversion', 'full', '1.2');
		$org .= "    ".xmltagwrite('metadata', 'close');

		$attributes = '';
		$attributes[0][] = 'href';
		$attributes[1][] = $circle1_files[0][$i];
		$org .= "    ".xmltagwrite('file', 'open', $attributes);

		$org .= "  ".xmltagwrite('resource', 'close');
		$i ++;
	}

	$org .= xmltagwrite('resources', 'close');
	$org .= xmltagwrite('manifest', 'close');
	$manifest = $header.$org;

	exporttofile('imsmanifest.xml', 'Manifest file', '0', $manifest);
}

/**
	* Gets the tags of the file given as parameter
	*
	* if $filename is not found, GetSRCTags(filename) will return FALSE
	* @param	string	file path
	* @return	mixed		array of strings on success, false on failure
	* @author unknown
	* @author included by imandak80 
	*/
function GetSRCTags($fileName)
{
	if (!($fp = fopen($fileName, "r")))
	{
		//if file can't be opened, return false
		return false;
	}
	//read file contents
	$contents = fread($fp, filesize($fileName));
	fclose($fp);

	$matches = array ();
	$srcList = array ();
	//get all src tags contents in this file. Use multi-line search.
	preg_match_all('/src(\s)*=(\s)*[\'"]([^\'"]*)[\'"]/mi', $contents, $matches); //get the img src as contained between " or '

	foreach ($matches[3] as $match)
	{
		if (!in_array($match, $srcList))
		{
			$srcList[] = $match;
		}
	}
	if (count($srcList) == 0)
	{
		return false;
	}
	return $srcList;
}

/**
 * Copy file and create directories in the path if needed.
 *
 * @param	string	$source Source path
 * @param	string	$dest Destination path 
 * @return boolean 	true on success, false on failure
 */
function CopyNCreate($source, $dest)
{
	if (strcmp($source, $dest) == 0)
		return false;

	$dir = "";
	$tdest = explode('/', $dest);
	for ($i = 0; $i < sizeof($tdest) - 1; $i ++)
	{
		$dir = $dir.$tdest[$i]."/";
		if (!is_dir($dir))
			if (!mkdir($dir))
				return false;
	}

	if (!copy($source, $dest))
		return false;

	return true;
}

function rcopy($source, $dest)
{
	//error_log($source." -> ".$dest,0);
	if (!file_exists($source))
	{
		//error_log($source." does not exist",0);
		return false;
	}

	if (is_dir($source))
	{
		//error_log($source." is a dir",0);
		//this is a directory
		//remove trailing '/'
		if (strrpos($source, '/') == sizeof($source) - 1)
		{
			$source = substr($source, 0, size_of($source) - 1);
		}
		if (strrpos($dest, '/') == sizeof($dest) - 1)
		{
			$dest = substr($dest, 0, size_of($dest) - 1);
		}

		if (!is_dir($dest))
		{
			$res = @ mkdir($dest);
			if ($res === true)
			{
				return true;
			}
			else
			{
				//remove latest part of path and try creating that
				if (rcopy(substr($source, 0, strrpos($source, '/')), substr($dest, 0, strrpos($dest, '/'))))
				{
					return @ mkdir($dest);
				}
				else
				{
					return false;
				}
			}
		}
		return true;
	}
	else
	{
		//this is presumably a file
		//error_log($source." is a file",0);
		if (!@ copy($source, $dest))
		{
			//error_log("Could not simple-copy $source",0);
			$res = rcopy(dirname($source), dirname($dest));
			if ($res === true)
			{
				//error_log("Welcome dir created",0);
				return @ copy($source, $dest);
			}
			else
			{
				return false;
				//error_log("Error creating path",0);
			}
		}
		else
		{
			//error_log("Could well simple-copy $source",0);
			return true;
		}
	}
}
?>
